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Finding the Fourth Proportional to 128,530.66, 192,851.47 and 49,700.42

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Solution

The fourth proportional to 128,530.66, 192,851.47 and 49,700.42 is: 74,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,530.66 : 192,851.47 = 49,700.42 : x
  2. Step 2: Convert to fraction form
    128,530.66/192,851.47 = 49,700.42/x
  3. Step 3: Cross multiply
    128,530.66x = 192,851.47 × 49,700.42
  4. Step 4: Simplify right side
    128,530.66x = 9,584,799,056.62
  5. Step 5: Solve for x
    x = 9,584,799,056.62/128,530.66
  6. Step 6: Final answer
    x = 74,572.08

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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.