Home / 40,117.74-55,303.45-30,540.90

Finding the Fourth Proportional to 40,117.74, 55,303.45 and 30,540.90

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Solution

The fourth proportional to 40,117.74, 55,303.45 and 30,540.90 is: 42,101.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,117.74 : 55,303.45 = 30,540.90 : x
  2. Step 2: Convert to fraction form
    40,117.74/55,303.45 = 30,540.90/x
  3. Step 3: Cross multiply
    40,117.74x = 55,303.45 × 30,540.90
  4. Step 4: Simplify right side
    40,117.74x = 1,689,017,136.11
  5. Step 5: Solve for x
    x = 1,689,017,136.11/40,117.74
  6. Step 6: Final answer
    x = 42,101.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.