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Finding the Fourth Proportional to 185,707.17, 278,671.44 and 67,387.74

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Solution

The fourth proportional to 185,707.17, 278,671.44 and 67,387.74 is: 101,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,707.17 : 278,671.44 = 67,387.74 : x
  2. Step 2: Convert to fraction form
    185,707.17/278,671.44 = 67,387.74/x
  3. Step 3: Cross multiply
    185,707.17x = 278,671.44 × 67,387.74
  4. Step 4: Simplify right side
    185,707.17x = 18,779,038,544.15
  5. Step 5: Solve for x
    x = 18,779,038,544.15/185,707.17
  6. Step 6: Final answer
    x = 101,121.77

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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.