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Finding the Fourth Proportional to 72,000.70, 108,001.05 and 61,978.30

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Solution

The fourth proportional to 72,000.70, 108,001.05 and 61,978.30 is: 92,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.70 : 108,001.05 = 61,978.30 : x
  2. Step 2: Convert to fraction form
    72,000.70/108,001.05 = 61,978.30/x
  3. Step 3: Cross multiply
    72,000.70x = 108,001.05 × 61,978.30
  4. Step 4: Simplify right side
    72,000.70x = 6,693,721,477.22
  5. Step 5: Solve for x
    x = 6,693,721,477.22/72,000.70
  6. Step 6: Final answer
    x = 92,967.45

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Similar ratio
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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.