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Finding the Fourth Proportional to 129,030.60, 193,545.90 and 121,254.60

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Solution

The fourth proportional to 129,030.60, 193,545.90 and 121,254.60 is: 181,881.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,030.60 : 193,545.90 = 121,254.60 : x
  2. Step 2: Convert to fraction form
    129,030.60/193,545.90 = 121,254.60/x
  3. Step 3: Cross multiply
    129,030.60x = 193,545.90 × 121,254.60
  4. Step 4: Simplify right side
    129,030.60x = 23,468,330,686.14
  5. Step 5: Solve for x
    x = 23,468,330,686.14/129,030.60
  6. Step 6: Final answer
    x = 181,881.90

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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.