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Finding the Fourth Proportional to 78,713.48, 108,621.45 and 42,902.74

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Solution

The fourth proportional to 78,713.48, 108,621.45 and 42,902.74 is: 59,204.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,713.48 : 108,621.45 = 42,902.74 : x
  2. Step 2: Convert to fraction form
    78,713.48/108,621.45 = 42,902.74/x
  3. Step 3: Cross multiply
    78,713.48x = 108,621.45 × 42,902.74
  4. Step 4: Simplify right side
    78,713.48x = 4,660,157,827.77
  5. Step 5: Solve for x
    x = 4,660,157,827.77/78,713.48
  6. Step 6: Final answer
    x = 59,204.06

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1.5x scale

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.