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Finding the Fourth Proportional to 79,188.47, 109,280.12 and 43,379.78

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Solution

The fourth proportional to 79,188.47, 109,280.12 and 43,379.78 is: 59,864.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,188.47 : 109,280.12 = 43,379.78 : x
  2. Step 2: Convert to fraction form
    79,188.47/109,280.12 = 43,379.78/x
  3. Step 3: Cross multiply
    79,188.47x = 109,280.12 × 43,379.78
  4. Step 4: Simplify right side
    79,188.47x = 4,740,547,126.02
  5. Step 5: Solve for x
    x = 4,740,547,126.02/79,188.47
  6. Step 6: Final answer
    x = 59,864.11

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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.