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Finding the Fourth Proportional to 84,999,760.80, 127,287,064.80 and 67,993,648.80

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Solution

The fourth proportional to 84,999,760.80, 127,287,064.80 and 67,993,648.80 is: 101,820,427.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,999,760.80 : 127,287,064.80 = 67,993,648.80 : x
  2. Step 2: Convert to fraction form
    84,999,760.80/127,287,064.80 = 67,993,648.80/x
  3. Step 3: Cross multiply
    84,999,760.80x = 127,287,064.80 × 67,993,648.80
  4. Step 4: Simplify right side
    84,999,760.80x = 8,654,711,980,794,042
  5. Step 5: Solve for x
    x = 8,654,711,980,794,042/84,999,760.80
  6. Step 6: Final answer
    x = 101,820,427.49

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1.5x scale

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.