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Finding the Fourth Proportional to 118,278.68, 163,260.76 and 72,970.76

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Solution

The fourth proportional to 118,278.68, 163,260.76 and 72,970.76 is: 100,721.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,278.68 : 163,260.76 = 72,970.76 : x
  2. Step 2: Convert to fraction form
    118,278.68/163,260.76 = 72,970.76/x
  3. Step 3: Cross multiply
    118,278.68x = 163,260.76 × 72,970.76
  4. Step 4: Simplify right side
    118,278.68x = 11,913,261,735.38
  5. Step 5: Solve for x
    x = 11,913,261,735.38/118,278.68
  6. Step 6: Final answer
    x = 100,721.97

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1.5x scale

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.