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Finding the Fourth Proportional to 66,488.60, 99,587.10 and 57,740.60

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Solution

The fourth proportional to 66,488.60, 99,587.10 and 57,740.60 is: 86,484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.60 : 99,587.10 = 57,740.60 : x
  2. Step 2: Convert to fraction form
    66,488.60/99,587.10 = 57,740.60/x
  3. Step 3: Cross multiply
    66,488.60x = 99,587.10 × 57,740.60
  4. Step 4: Simplify right side
    66,488.60x = 5,750,218,906.26
  5. Step 5: Solve for x
    x = 5,750,218,906.26/66,488.60
  6. Step 6: Final answer
    x = 86,484.28

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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.