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Finding the Fourth Proportional to 78,220.95, 117,051.12 and 67,727.16

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Solution

The fourth proportional to 78,220.95, 117,051.12 and 67,727.16 is: 101,348.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,220.95 : 117,051.12 = 67,727.16 : x
  2. Step 2: Convert to fraction form
    78,220.95/117,051.12 = 67,727.16/x
  3. Step 3: Cross multiply
    78,220.95x = 117,051.12 × 67,727.16
  4. Step 4: Simplify right side
    78,220.95x = 7,927,539,932.42
  5. Step 5: Solve for x
    x = 7,927,539,932.42/78,220.95
  6. Step 6: Final answer
    x = 101,348.04

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1.5x scale

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.