Home / 187,478.09-281,210.81-75,128.15

Finding the Fourth Proportional to 187,478.09, 281,210.81 and 75,128.15

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Solution

The fourth proportional to 187,478.09, 281,210.81 and 75,128.15 is: 112,689.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,478.09 : 281,210.81 = 75,128.15 : x
  2. Step 2: Convert to fraction form
    187,478.09/281,210.81 = 75,128.15/x
  3. Step 3: Cross multiply
    187,478.09x = 281,210.81 × 75,128.15
  4. Step 4: Simplify right side
    187,478.09x = 21,126,846,133.61
  5. Step 5: Solve for x
    x = 21,126,846,133.61/187,478.09
  6. Step 6: Final answer
    x = 112,689.68

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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.