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Finding the Fourth Proportional to 79,215.46, 109,319.87 and 43,407.74

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Solution

The fourth proportional to 79,215.46, 109,319.87 and 43,407.74 is: 59,904.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,215.46 : 109,319.87 = 43,407.74 : x
  2. Step 2: Convert to fraction form
    79,215.46/109,319.87 = 43,407.74/x
  3. Step 3: Cross multiply
    79,215.46x = 109,319.87 × 43,407.74
  4. Step 4: Simplify right side
    79,215.46x = 4,745,328,875.61
  5. Step 5: Solve for x
    x = 4,745,328,875.61/79,215.46
  6. Step 6: Final answer
    x = 59,904.08

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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.