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Finding the Fourth Proportional to 59,966.40, 90,007.20 and 51,211.20

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Solution

The fourth proportional to 59,966.40, 90,007.20 and 51,211.20 is: 76,865.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,966.40 : 90,007.20 = 51,211.20 : x
  2. Step 2: Convert to fraction form
    59,966.40/90,007.20 = 51,211.20/x
  3. Step 3: Cross multiply
    59,966.40x = 90,007.20 × 51,211.20
  4. Step 4: Simplify right side
    59,966.40x = 4,609,376,720.64
  5. Step 5: Solve for x
    x = 4,609,376,720.64/59,966.40
  6. Step 6: Final answer
    x = 76,865.99

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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.