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Finding the Fourth Proportional to 118,478.76, 163,474.32 and 68,177.76

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Solution

The fourth proportional to 118,478.76, 163,474.32 and 68,177.76 is: 94,070.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,478.76 : 163,474.32 = 68,177.76 : x
  2. Step 2: Convert to fraction form
    118,478.76/163,474.32 = 68,177.76/x
  3. Step 3: Cross multiply
    118,478.76x = 163,474.32 × 68,177.76
  4. Step 4: Simplify right side
    118,478.76x = 11,145,312,955.12
  5. Step 5: Solve for x
    x = 11,145,312,955.12/118,478.76
  6. Step 6: Final answer
    x = 94,070.14

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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.