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Finding the Fourth Proportional to 160,531.20, 240,710.40 and 66,931.20

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Solution

The fourth proportional to 160,531.20, 240,710.40 and 66,931.20 is: 100,360.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,531.20 : 240,710.40 = 66,931.20 : x
  2. Step 2: Convert to fraction form
    160,531.20/240,710.40 = 66,931.20/x
  3. Step 3: Cross multiply
    160,531.20x = 240,710.40 × 66,931.20
  4. Step 4: Simplify right side
    160,531.20x = 16,111,035,924.48
  5. Step 5: Solve for x
    x = 16,111,035,924.48/160,531.20
  6. Step 6: Final answer
    x = 100,360.78

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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.