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Finding the Fourth Proportional to 84,999,724.80, 127,287,010.80 and 67,993,612.80

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Solution

The fourth proportional to 84,999,724.80, 127,287,010.80 and 67,993,612.80 is: 101,820,373.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,999,724.80 : 127,287,010.80 = 67,993,612.80 : x
  2. Step 2: Convert to fraction form
    84,999,724.80/127,287,010.80 = 67,993,612.80/x
  3. Step 3: Cross multiply
    84,999,724.80x = 127,287,010.80 × 67,993,612.80
  4. Step 4: Simplify right side
    84,999,724.80x = 8,654,703,726,804,618
  5. Step 5: Solve for x
    x = 8,654,703,726,804,618/84,999,724.80
  6. Step 6: Final answer
    x = 101,820,373.50

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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.