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Finding the Fourth Proportional to 79,130.40, 109,250.90 and 70,617.92

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Solution

The fourth proportional to 79,130.40, 109,250.90 and 70,617.92 is: 97,498.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,130.40 : 109,250.90 = 70,617.92 : x
  2. Step 2: Convert to fraction form
    79,130.40/109,250.90 = 70,617.92/x
  3. Step 3: Cross multiply
    79,130.40x = 109,250.90 × 70,617.92
  4. Step 4: Simplify right side
    79,130.40x = 7,715,070,416.78
  5. Step 5: Solve for x
    x = 7,715,070,416.78/79,130.40
  6. Step 6: Final answer
    x = 97,498.19

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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.