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Finding the Fourth Proportional to 102,587.60, 153,531.30 and 85,966.40

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Solution

The fourth proportional to 102,587.60, 153,531.30 and 85,966.40 is: 128,656.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,587.60 : 153,531.30 = 85,966.40 : x
  2. Step 2: Convert to fraction form
    102,587.60/153,531.30 = 85,966.40/x
  3. Step 3: Cross multiply
    102,587.60x = 153,531.30 × 85,966.40
  4. Step 4: Simplify right side
    102,587.60x = 13,198,533,148.32
  5. Step 5: Solve for x
    x = 13,198,533,148.32/102,587.60
  6. Step 6: Final answer
    x = 128,656.22

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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.