Home / 100,355.40-138,470.85-59,511.96

Finding the Fourth Proportional to 100,355.40, 138,470.85 and 59,511.96

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Solution

The fourth proportional to 100,355.40, 138,470.85 and 59,511.96 is: 82,114.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,355.40 : 138,470.85 = 59,511.96 : x
  2. Step 2: Convert to fraction form
    100,355.40/138,470.85 = 59,511.96/x
  3. Step 3: Cross multiply
    100,355.40x = 138,470.85 × 59,511.96
  4. Step 4: Simplify right side
    100,355.40x = 8,240,671,686.37
  5. Step 5: Solve for x
    x = 8,240,671,686.37/100,355.40
  6. Step 6: Final answer
    x = 82,114.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.