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Finding the Fourth Proportional to 121,436.70, 181,863.45 and 98,108.70

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Solution

The fourth proportional to 121,436.70, 181,863.45 and 98,108.70 is: 146,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,436.70 : 181,863.45 = 98,108.70 : x
  2. Step 2: Convert to fraction form
    121,436.70/181,863.45 = 98,108.70/x
  3. Step 3: Cross multiply
    121,436.70x = 181,863.45 × 98,108.70
  4. Step 4: Simplify right side
    121,436.70x = 17,842,386,657.02
  5. Step 5: Solve for x
    x = 17,842,386,657.02/121,436.70
  6. Step 6: Final answer
    x = 146,927.47

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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.