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Finding the Fourth Proportional to 118,564.68, 163,524.78 and 100,718.76

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Solution

The fourth proportional to 118,564.68, 163,524.78 and 100,718.76 is: 138,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,564.68 : 163,524.78 = 100,718.76 : x
  2. Step 2: Convert to fraction form
    118,564.68/163,524.78 = 100,718.76/x
  3. Step 3: Cross multiply
    118,564.68x = 163,524.78 × 100,718.76
  4. Step 4: Simplify right side
    118,564.68x = 16,470,013,070.87
  5. Step 5: Solve for x
    x = 16,470,013,070.87/118,564.68
  6. Step 6: Final answer
    x = 138,911.63

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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.