Home / 78,214.90-107,937.30-42,405.02

Finding the Fourth Proportional to 78,214.90, 107,937.30 and 42,405.02

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Solution

The fourth proportional to 78,214.90, 107,937.30 and 42,405.02 is: 58,519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,214.90 : 107,937.30 = 42,405.02 : x
  2. Step 2: Convert to fraction form
    78,214.90/107,937.30 = 42,405.02/x
  3. Step 3: Cross multiply
    78,214.90x = 107,937.30 × 42,405.02
  4. Step 4: Simplify right side
    78,214.90x = 4,577,083,091.18
  5. Step 5: Solve for x
    x = 4,577,083,091.18/78,214.90
  6. Step 6: Final answer
    x = 58,519.32

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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.