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Finding the Fourth Proportional to 265,669.92, 398,581.92 and 78,685.92

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Solution

The fourth proportional to 265,669.92, 398,581.92 and 78,685.92 is: 118,051.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,669.92 : 398,581.92 = 78,685.92 : x
  2. Step 2: Convert to fraction form
    265,669.92/398,581.92 = 78,685.92/x
  3. Step 3: Cross multiply
    265,669.92x = 398,581.92 × 78,685.92
  4. Step 4: Simplify right side
    265,669.92x = 31,362,785,070.57
  5. Step 5: Solve for x
    x = 31,362,785,070.57/265,669.92
  6. Step 6: Final answer
    x = 118,051.70

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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.