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Finding the Fourth Proportional to 138,978.99, 191,689.74 and 88,000.02

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Solution

The fourth proportional to 138,978.99, 191,689.74 and 88,000.02 is: 121,375.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,978.99 : 191,689.74 = 88,000.02 : x
  2. Step 2: Convert to fraction form
    138,978.99/191,689.74 = 88,000.02/x
  3. Step 3: Cross multiply
    138,978.99x = 191,689.74 × 88,000.02
  4. Step 4: Simplify right side
    138,978.99x = 16,868,700,953.79
  5. Step 5: Solve for x
    x = 16,868,700,953.79/138,978.99
  6. Step 6: Final answer
    x = 121,375.91

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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.