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Finding the Fourth Proportional to 97,801.20, 146,572.20 and 86,655.60

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Solution

The fourth proportional to 97,801.20, 146,572.20 and 86,655.60 is: 129,868.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,801.20 : 146,572.20 = 86,655.60 : x
  2. Step 2: Convert to fraction form
    97,801.20/146,572.20 = 86,655.60/x
  3. Step 3: Cross multiply
    97,801.20x = 146,572.20 × 86,655.60
  4. Step 4: Simplify right side
    97,801.20x = 12,701,301,934.32
  5. Step 5: Solve for x
    x = 12,701,301,934.32/97,801.20
  6. Step 6: Final answer
    x = 129,868.57

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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.