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Finding the Fourth Proportional to 83,247,761.80, 124,871,642.70 and 81,972,303.40

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Solution

The fourth proportional to 83,247,761.80, 124,871,642.70 and 81,972,303.40 is: 122,958,455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,247,761.80 : 124,871,642.70 = 81,972,303.40 : x
  2. Step 2: Convert to fraction form
    83,247,761.80/124,871,642.70 = 81,972,303.40/x
  3. Step 3: Cross multiply
    83,247,761.80x = 124,871,642.70 × 81,972,303.40
  4. Step 4: Simplify right side
    83,247,761.80x = 10,236,016,181,460,796
  5. Step 5: Solve for x
    x = 10,236,016,181,460,796/83,247,761.80
  6. Step 6: Final answer
    x = 122,958,455.10

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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.