Home / 86,621.80-129,867.90-47,223.40

Finding the Fourth Proportional to 86,621.80, 129,867.90 and 47,223.40

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Solution

The fourth proportional to 86,621.80, 129,867.90 and 47,223.40 is: 70,799.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,621.80 : 129,867.90 = 47,223.40 : x
  2. Step 2: Convert to fraction form
    86,621.80/129,867.90 = 47,223.40/x
  3. Step 3: Cross multiply
    86,621.80x = 129,867.90 × 47,223.40
  4. Step 4: Simplify right side
    86,621.80x = 6,132,803,788.86
  5. Step 5: Solve for x
    x = 6,132,803,788.86/86,621.80
  6. Step 6: Final answer
    x = 70,799.77

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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.