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Finding the Fourth Proportional to 287,671.60, 431,572.20 and 88,001.20

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Solution

The fourth proportional to 287,671.60, 431,572.20 and 88,001.20 is: 132,021.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,671.60 : 431,572.20 = 88,001.20 : x
  2. Step 2: Convert to fraction form
    287,671.60/431,572.20 = 88,001.20/x
  3. Step 3: Cross multiply
    287,671.60x = 431,572.20 × 88,001.20
  4. Step 4: Simplify right side
    287,671.60x = 37,978,871,486.64
  5. Step 5: Solve for x
    x = 37,978,871,486.64/287,671.60
  6. Step 6: Final answer
    x = 132,021.62

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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.