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Finding the Fourth Proportional to 81,098.88, 121,665.90 and 45,595.50

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Solution

The fourth proportional to 81,098.88, 121,665.90 and 45,595.50 is: 68,403.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,098.88 : 121,665.90 = 45,595.50 : x
  2. Step 2: Convert to fraction form
    81,098.88/121,665.90 = 45,595.50/x
  3. Step 3: Cross multiply
    81,098.88x = 121,665.90 × 45,595.50
  4. Step 4: Simplify right side
    81,098.88x = 5,547,417,543.45
  5. Step 5: Solve for x
    x = 5,547,417,543.45/81,098.88
  6. Step 6: Final answer
    x = 68,403.13

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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.