Home / 78,985.88-118,373.70-38,943.74

Finding the Fourth Proportional to 78,985.88, 118,373.70 and 38,943.74

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Solution

The fourth proportional to 78,985.88, 118,373.70 and 38,943.74 is: 58,363.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,985.88 : 118,373.70 = 38,943.74 : x
  2. Step 2: Convert to fraction form
    78,985.88/118,373.70 = 38,943.74/x
  3. Step 3: Cross multiply
    78,985.88x = 118,373.70 × 38,943.74
  4. Step 4: Simplify right side
    78,985.88x = 4,609,914,595.64
  5. Step 5: Solve for x
    x = 4,609,914,595.64/78,985.88
  6. Step 6: Final answer
    x = 58,363.78

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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.