Home / 128,463.16-192,699.78-39,708.76

Finding the Fourth Proportional to 128,463.16, 192,699.78 and 39,708.76

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Solution

The fourth proportional to 128,463.16, 192,699.78 and 39,708.76 is: 59,564.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,463.16 : 192,699.78 = 39,708.76 : x
  2. Step 2: Convert to fraction form
    128,463.16/192,699.78 = 39,708.76/x
  3. Step 3: Cross multiply
    128,463.16x = 192,699.78 × 39,708.76
  4. Step 4: Simplify right side
    128,463.16x = 7,651,869,316.07
  5. Step 5: Solve for x
    x = 7,651,869,316.07/128,463.16
  6. Step 6: Final answer
    x = 59,564.70

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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.