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Finding the Fourth Proportional to 66,059.40, 99,088.20 and 21,687.60

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Solution

The fourth proportional to 66,059.40, 99,088.20 and 21,687.60 is: 32,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,059.40 : 99,088.20 = 21,687.60 : x
  2. Step 2: Convert to fraction form
    66,059.40/99,088.20 = 21,687.60/x
  3. Step 3: Cross multiply
    66,059.40x = 99,088.20 × 21,687.60
  4. Step 4: Simplify right side
    66,059.40x = 2,148,985,246.32
  5. Step 5: Solve for x
    x = 2,148,985,246.32/66,059.40
  6. Step 6: Final answer
    x = 32,531.10

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Similar ratio
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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.