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Finding the Fourth Proportional to 97,712.80, 146,223.60 and 67,991.20

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Solution

The fourth proportional to 97,712.80, 146,223.60 and 67,991.20 is: 101,746.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,712.80 : 146,223.60 = 67,991.20 : x
  2. Step 2: Convert to fraction form
    97,712.80/146,223.60 = 67,991.20/x
  3. Step 3: Cross multiply
    97,712.80x = 146,223.60 × 67,991.20
  4. Step 4: Simplify right side
    97,712.80x = 9,941,918,032.32
  5. Step 5: Solve for x
    x = 9,941,918,032.32/97,712.80
  6. Step 6: Final answer
    x = 101,746.32

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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.