Home / 90,307.20-135,331.20-66,428.40

Finding the Fourth Proportional to 90,307.20, 135,331.20 and 66,428.40

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Solution

The fourth proportional to 90,307.20, 135,331.20 and 66,428.40 is: 99,547.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,307.20 : 135,331.20 = 66,428.40 : x
  2. Step 2: Convert to fraction form
    90,307.20/135,331.20 = 66,428.40/x
  3. Step 3: Cross multiply
    90,307.20x = 135,331.20 × 66,428.40
  4. Step 4: Simplify right side
    90,307.20x = 8,989,835,086.08
  5. Step 5: Solve for x
    x = 8,989,835,086.08/90,307.20
  6. Step 6: Final answer
    x = 99,547.27

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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.