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Finding the Fourth Proportional to 72,377.40, 99,908.46 and 70,379.88

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Solution

The fourth proportional to 72,377.40, 99,908.46 and 70,379.88 is: 97,151.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,377.40 : 99,908.46 = 70,379.88 : x
  2. Step 2: Convert to fraction form
    72,377.40/99,908.46 = 70,379.88/x
  3. Step 3: Cross multiply
    72,377.40x = 99,908.46 × 70,379.88
  4. Step 4: Simplify right side
    72,377.40x = 7,031,545,425.78
  5. Step 5: Solve for x
    x = 7,031,545,425.78/72,377.40
  6. Step 6: Final answer
    x = 97,151.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.