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Finding the Fourth Proportional to 265,877.63, 398,816.45 and 78,889.13

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Solution

The fourth proportional to 265,877.63, 398,816.45 and 78,889.13 is: 118,333.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,877.63 : 398,816.45 = 78,889.13 : x
  2. Step 2: Convert to fraction form
    265,877.63/398,816.45 = 78,889.13/x
  3. Step 3: Cross multiply
    265,877.63x = 398,816.45 × 78,889.13
  4. Step 4: Simplify right side
    265,877.63x = 31,462,280,381.66
  5. Step 5: Solve for x
    x = 31,462,280,381.66/265,877.63
  6. Step 6: Final answer
    x = 118,333.69

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Similar ratio
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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.