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Finding the Fourth Proportional to 99,691.78, 137,567.01 and 57,263.98

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Solution

The fourth proportional to 99,691.78, 137,567.01 and 57,263.98 is: 79,019.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,691.78 : 137,567.01 = 57,263.98 : x
  2. Step 2: Convert to fraction form
    99,691.78/137,567.01 = 57,263.98/x
  3. Step 3: Cross multiply
    99,691.78x = 137,567.01 × 57,263.98
  4. Step 4: Simplify right side
    99,691.78x = 7,877,634,509.30
  5. Step 5: Solve for x
    x = 7,877,634,509.30/99,691.78
  6. Step 6: Final answer
    x = 79,019.90

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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.