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Finding the Fourth Proportional to 79,309.13, 109,472.78 and 70,901.57

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Solution

The fourth proportional to 79,309.13, 109,472.78 and 70,901.57 is: 97,867.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,309.13 : 109,472.78 = 70,901.57 : x
  2. Step 2: Convert to fraction form
    79,309.13/109,472.78 = 70,901.57/x
  3. Step 3: Cross multiply
    79,309.13x = 109,472.78 × 70,901.57
  4. Step 4: Simplify right side
    79,309.13x = 7,761,792,070.69
  5. Step 5: Solve for x
    x = 7,761,792,070.69/79,309.13
  6. Step 6: Final answer
    x = 97,867.57

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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.