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Finding the Fourth Proportional to 128,922.90, 193,432.95 and 62,421.90

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Solution

The fourth proportional to 128,922.90, 193,432.95 and 62,421.90 is: 93,656.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.90 : 193,432.95 = 62,421.90 : x
  2. Step 2: Convert to fraction form
    128,922.90/193,432.95 = 62,421.90/x
  3. Step 3: Cross multiply
    128,922.90x = 193,432.95 × 62,421.90
  4. Step 4: Simplify right side
    128,922.90x = 12,074,452,261.61
  5. Step 5: Solve for x
    x = 12,074,452,261.61/128,922.90
  6. Step 6: Final answer
    x = 93,656.38

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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.