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Finding the Fourth Proportional to 78,346.90, 108,118.38 and 42,536.62

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Solution

The fourth proportional to 78,346.90, 108,118.38 and 42,536.62 is: 58,700.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,346.90 : 108,118.38 = 42,536.62 : x
  2. Step 2: Convert to fraction form
    78,346.90/108,118.38 = 42,536.62/x
  3. Step 3: Cross multiply
    78,346.90x = 108,118.38 × 42,536.62
  4. Step 4: Simplify right side
    78,346.90x = 4,598,990,445.08
  5. Step 5: Solve for x
    x = 4,598,990,445.08/78,346.90
  6. Step 6: Final answer
    x = 58,700.35

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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.