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Finding the Fourth Proportional to 128,339.56, 192,510.24 and 39,591.12

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Solution

The fourth proportional to 128,339.56, 192,510.24 and 39,591.12 is: 59,386.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,339.56 : 192,510.24 = 39,591.12 : x
  2. Step 2: Convert to fraction form
    128,339.56/192,510.24 = 39,591.12/x
  3. Step 3: Cross multiply
    128,339.56x = 192,510.24 × 39,591.12
  4. Step 4: Simplify right side
    128,339.56x = 7,621,696,013.07
  5. Step 5: Solve for x
    x = 7,621,696,013.07/128,339.56
  6. Step 6: Final answer
    x = 59,386.96

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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.