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Finding the Fourth Proportional to 121,442.98, 181,821.03 and 64,386.91

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Solution

The fourth proportional to 121,442.98, 181,821.03 and 64,386.91 is: 96,398.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,442.98 : 181,821.03 = 64,386.91 : x
  2. Step 2: Convert to fraction form
    121,442.98/181,821.03 = 64,386.91/x
  3. Step 3: Cross multiply
    121,442.98x = 181,821.03 × 64,386.91
  4. Step 4: Simplify right side
    121,442.98x = 11,706,894,294.72
  5. Step 5: Solve for x
    x = 11,706,894,294.72/121,442.98
  6. Step 6: Final answer
    x = 96,398.28

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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.