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Finding the Fourth Proportional to 121,543.60, 181,926.60 and 86,551.60

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Solution

The fourth proportional to 121,543.60, 181,926.60 and 86,551.60 is: 129,550.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,543.60 : 181,926.60 = 86,551.60 : x
  2. Step 2: Convert to fraction form
    121,543.60/181,926.60 = 86,551.60/x
  3. Step 3: Cross multiply
    121,543.60x = 181,926.60 × 86,551.60
  4. Step 4: Simplify right side
    121,543.60x = 15,746,038,312.56
  5. Step 5: Solve for x
    x = 15,746,038,312.56/121,543.60
  6. Step 6: Final answer
    x = 129,550.53

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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.