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Finding the Fourth Proportional to 129,061, 193,598.79 and 45,955

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Solution

The fourth proportional to 129,061, 193,598.79 and 45,955 is: 68,935.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,061 : 193,598.79 = 45,955 : x
  2. Step 2: Convert to fraction form
    129,061/193,598.79 = 45,955/x
  3. Step 3: Cross multiply
    129,061x = 193,598.79 × 45,955
  4. Step 4: Simplify right side
    129,061x = 8,896,832,394.45
  5. Step 5: Solve for x
    x = 8,896,832,394.45/129,061
  6. Step 6: Final answer
    x = 68,935.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.