Home / 70,560-105,840-31,648

Finding the Fourth Proportional to 70,560, 105,840 and 31,648

Calculator

Solution

The fourth proportional to 70,560, 105,840 and 31,648 is: 47,472

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,560 : 105,840 = 31,648 : x
  2. Step 2: Convert to fraction form
    70,560/105,840 = 31,648/x
  3. Step 3: Cross multiply
    70,560x = 105,840 × 31,648
  4. Step 4: Simplify right side
    70,560x = 3,349,624,320
  5. Step 5: Solve for x
    x = 3,349,624,320/70,560
  6. Step 6: Final answer
    x = 47,472

Related Problems

Find fourth proportional to 35,280, 52,920 and 15,824
Half scale
Find fourth proportional to 141,120, 211,680 and 63,296
Double scale
Find fourth proportional to 70,561, 105,841.50 and 31,649
Similar ratio
Find fourth proportional to 105,840, 158,760 and 47,472
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.