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Finding the Fourth Proportional to 128,502.60, 192,643.02 and 61,851.06

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Solution

The fourth proportional to 128,502.60, 192,643.02 and 61,851.06 is: 92,723.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,502.60 : 192,643.02 = 61,851.06 : x
  2. Step 2: Convert to fraction form
    128,502.60/192,643.02 = 61,851.06/x
  3. Step 3: Cross multiply
    128,502.60x = 192,643.02 × 61,851.06
  4. Step 4: Simplify right side
    128,502.60x = 11,915,174,988.60
  5. Step 5: Solve for x
    x = 11,915,174,988.60/128,502.60
  6. Step 6: Final answer
    x = 92,723.22

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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.