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Finding the Fourth Proportional to 139,547.59, 192,569.80 and 79,122.28

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Solution

The fourth proportional to 139,547.59, 192,569.80 and 79,122.28 is: 109,185.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,547.59 : 192,569.80 = 79,122.28 : x
  2. Step 2: Convert to fraction form
    139,547.59/192,569.80 = 79,122.28/x
  3. Step 3: Cross multiply
    139,547.59x = 192,569.80 × 79,122.28
  4. Step 4: Simplify right side
    139,547.59x = 15,236,561,635.14
  5. Step 5: Solve for x
    x = 15,236,561,635.14/139,547.59
  6. Step 6: Final answer
    x = 109,185.42

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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.