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Finding the Fourth Proportional to 121,254.60, 181,881.90 and 103,539.90

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Solution

The fourth proportional to 121,254.60, 181,881.90 and 103,539.90 is: 155,309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,254.60 : 181,881.90 = 103,539.90 : x
  2. Step 2: Convert to fraction form
    121,254.60/181,881.90 = 103,539.90/x
  3. Step 3: Cross multiply
    121,254.60x = 181,881.90 × 103,539.90
  4. Step 4: Simplify right side
    121,254.60x = 18,832,033,737.81
  5. Step 5: Solve for x
    x = 18,832,033,737.81/121,254.60
  6. Step 6: Final answer
    x = 155,309.85

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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.