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Finding the Fourth Proportional to 70,969.38, 97,979.13 and 47,128.74

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Solution

The fourth proportional to 70,969.38, 97,979.13 and 47,128.74 is: 65,065.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,969.38 : 97,979.13 = 47,128.74 : x
  2. Step 2: Convert to fraction form
    70,969.38/97,979.13 = 47,128.74/x
  3. Step 3: Cross multiply
    70,969.38x = 97,979.13 × 47,128.74
  4. Step 4: Simplify right side
    70,969.38x = 4,617,632,943.20
  5. Step 5: Solve for x
    x = 4,617,632,943.20/70,969.38
  6. Step 6: Final answer
    x = 65,065.14

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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.