Home / 78,522.90-108,363.04-42,713.20

Finding the Fourth Proportional to 78,522.90, 108,363.04 and 42,713.20

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Solution

The fourth proportional to 78,522.90, 108,363.04 and 42,713.20 is: 58,945.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,522.90 : 108,363.04 = 42,713.20 : x
  2. Step 2: Convert to fraction form
    78,522.90/108,363.04 = 42,713.20/x
  3. Step 3: Cross multiply
    78,522.90x = 108,363.04 × 42,713.20
  4. Step 4: Simplify right side
    78,522.90x = 4,628,532,200.13
  5. Step 5: Solve for x
    x = 4,628,532,200.13/78,522.90
  6. Step 6: Final answer
    x = 58,945.00

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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.