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Finding the Fourth Proportional to 121,145.87, 181,748.10 and 38,039.87

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Solution

The fourth proportional to 121,145.87, 181,748.10 and 38,039.87 is: 57,069.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,145.87 : 181,748.10 = 38,039.87 : x
  2. Step 2: Convert to fraction form
    121,145.87/181,748.10 = 38,039.87/x
  3. Step 3: Cross multiply
    121,145.87x = 181,748.10 × 38,039.87
  4. Step 4: Simplify right side
    121,145.87x = 6,913,674,096.75
  5. Step 5: Solve for x
    x = 6,913,674,096.75/121,145.87
  6. Step 6: Final answer
    x = 57,069.00

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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.