Home / 90,143.28-124,381.98-56,140.90

Finding the Fourth Proportional to 90,143.28, 124,381.98 and 56,140.90

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Solution

The fourth proportional to 90,143.28, 124,381.98 and 56,140.90 is: 77,464.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,143.28 : 124,381.98 = 56,140.90 : x
  2. Step 2: Convert to fraction form
    90,143.28/124,381.98 = 56,140.90/x
  3. Step 3: Cross multiply
    90,143.28x = 124,381.98 × 56,140.90
  4. Step 4: Simplify right side
    90,143.28x = 6,982,915,990.03
  5. Step 5: Solve for x
    x = 6,982,915,990.03/90,143.28
  6. Step 6: Final answer
    x = 77,464.63

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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.