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Finding the Fourth Proportional to 142,155.88, 212,770.88 and 104,701.20

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Solution

The fourth proportional to 142,155.88, 212,770.88 and 104,701.20 is: 156,710.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,155.88 : 212,770.88 = 104,701.20 : x
  2. Step 2: Convert to fraction form
    142,155.88/212,770.88 = 104,701.20/x
  3. Step 3: Cross multiply
    142,155.88x = 212,770.88 × 104,701.20
  4. Step 4: Simplify right side
    142,155.88x = 22,277,366,461.06
  5. Step 5: Solve for x
    x = 22,277,366,461.06/142,155.88
  6. Step 6: Final answer
    x = 156,710.83

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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.