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Finding the Fourth Proportional to 97,709.60, 146,564.40 and 83,712.80

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Solution

The fourth proportional to 97,709.60, 146,564.40 and 83,712.80 is: 125,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,709.60 : 146,564.40 = 83,712.80 : x
  2. Step 2: Convert to fraction form
    97,709.60/146,564.40 = 83,712.80/x
  3. Step 3: Cross multiply
    97,709.60x = 146,564.40 × 83,712.80
  4. Step 4: Simplify right side
    97,709.60x = 12,269,316,304.32
  5. Step 5: Solve for x
    x = 12,269,316,304.32/97,709.60
  6. Step 6: Final answer
    x = 125,569.20

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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.