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Finding the Fourth Proportional to 72,000.70, 108,001.05 and 67,918.30

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Solution

The fourth proportional to 72,000.70, 108,001.05 and 67,918.30 is: 101,877.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.70 : 108,001.05 = 67,918.30 : x
  2. Step 2: Convert to fraction form
    72,000.70/108,001.05 = 67,918.30/x
  3. Step 3: Cross multiply
    72,000.70x = 108,001.05 × 67,918.30
  4. Step 4: Simplify right side
    72,000.70x = 7,335,247,714.22
  5. Step 5: Solve for x
    x = 7,335,247,714.22/72,000.70
  6. Step 6: Final answer
    x = 101,877.45

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1.5x scale

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.