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Finding the Fourth Proportional to 128,464.47, 192,715.08 and 39,724.82

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Solution

The fourth proportional to 128,464.47, 192,715.08 and 39,724.82 is: 59,592.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,464.47 : 192,715.08 = 39,724.82 : x
  2. Step 2: Convert to fraction form
    128,464.47/192,715.08 = 39,724.82/x
  3. Step 3: Cross multiply
    128,464.47x = 192,715.08 × 39,724.82
  4. Step 4: Simplify right side
    128,464.47x = 7,655,571,864.29
  5. Step 5: Solve for x
    x = 7,655,571,864.29/128,464.47
  6. Step 6: Final answer
    x = 59,592.91

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1.5x scale

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.