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Finding the Fourth Proportional to 121,095.60, 181,643.40 and 74,374.80

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Solution

The fourth proportional to 121,095.60, 181,643.40 and 74,374.80 is: 111,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,095.60 : 181,643.40 = 74,374.80 : x
  2. Step 2: Convert to fraction form
    121,095.60/181,643.40 = 74,374.80/x
  3. Step 3: Cross multiply
    121,095.60x = 181,643.40 × 74,374.80
  4. Step 4: Simplify right side
    121,095.60x = 13,509,691,546.32
  5. Step 5: Solve for x
    x = 13,509,691,546.32/121,095.60
  6. Step 6: Final answer
    x = 111,562.20

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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.