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Finding the Fourth Proportional to 137,151.80, 189,307.56 and 79,802.20

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Solution

The fourth proportional to 137,151.80, 189,307.56 and 79,802.20 is: 110,149.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,151.80 : 189,307.56 = 79,802.20 : x
  2. Step 2: Convert to fraction form
    137,151.80/189,307.56 = 79,802.20/x
  3. Step 3: Cross multiply
    137,151.80x = 189,307.56 × 79,802.20
  4. Step 4: Simplify right side
    137,151.80x = 15,107,159,764.63
  5. Step 5: Solve for x
    x = 15,107,159,764.63/137,151.80
  6. Step 6: Final answer
    x = 110,149.19

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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.