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Finding the Fourth Proportional to 99,840.60, 137,590.56 and 71,497.08

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Solution

The fourth proportional to 99,840.60, 137,590.56 and 71,497.08 is: 98,530.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,840.60 : 137,590.56 = 71,497.08 : x
  2. Step 2: Convert to fraction form
    99,840.60/137,590.56 = 71,497.08/x
  3. Step 3: Cross multiply
    99,840.60x = 137,590.56 × 71,497.08
  4. Step 4: Simplify right side
    99,840.60x = 9,837,323,275.56
  5. Step 5: Solve for x
    x = 9,837,323,275.56/99,840.60
  6. Step 6: Final answer
    x = 98,530.29

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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.