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Finding the Fourth Proportional to 99,156, 136,842.60 and 61,437.60

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Solution

The fourth proportional to 99,156, 136,842.60 and 61,437.60 is: 84,788.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,156 : 136,842.60 = 61,437.60 : x
  2. Step 2: Convert to fraction form
    99,156/136,842.60 = 61,437.60/x
  3. Step 3: Cross multiply
    99,156x = 136,842.60 × 61,437.60
  4. Step 4: Simplify right side
    99,156x = 8,407,280,921.76
  5. Step 5: Solve for x
    x = 8,407,280,921.76/99,156
  6. Step 6: Final answer
    x = 84,788.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.