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Finding the Fourth Proportional to 118,672.78, 163,762.08 and 64,947.40

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Solution

The fourth proportional to 118,672.78, 163,762.08 and 64,947.40 is: 89,623.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,672.78 : 163,762.08 = 64,947.40 : x
  2. Step 2: Convert to fraction form
    118,672.78/163,762.08 = 64,947.40/x
  3. Step 3: Cross multiply
    118,672.78x = 163,762.08 × 64,947.40
  4. Step 4: Simplify right side
    118,672.78x = 10,635,921,314.59
  5. Step 5: Solve for x
    x = 10,635,921,314.59/118,672.78
  6. Step 6: Final answer
    x = 89,623.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.