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Finding the Fourth Proportional to 99,572.60, 137,403.78 and 59,289.32

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Solution

The fourth proportional to 99,572.60, 137,403.78 and 59,289.32 is: 81,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,572.60 : 137,403.78 = 59,289.32 : x
  2. Step 2: Convert to fraction form
    99,572.60/137,403.78 = 59,289.32/x
  3. Step 3: Cross multiply
    99,572.60x = 137,403.78 × 59,289.32
  4. Step 4: Simplify right side
    99,572.60x = 8,146,576,681.63
  5. Step 5: Solve for x
    x = 8,146,576,681.63/99,572.60
  6. Step 6: Final answer
    x = 81,815.45

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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.