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Finding the Fourth Proportional to 118,217.70, 163,104.89 and 77,916.98

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Solution

The fourth proportional to 118,217.70, 163,104.89 and 77,916.98 is: 107,502.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,217.70 : 163,104.89 = 77,916.98 : x
  2. Step 2: Convert to fraction form
    118,217.70/163,104.89 = 77,916.98/x
  3. Step 3: Cross multiply
    118,217.70x = 163,104.89 × 77,916.98
  4. Step 4: Simplify right side
    118,217.70x = 12,708,640,452.03
  5. Step 5: Solve for x
    x = 12,708,640,452.03/118,217.70
  6. Step 6: Final answer
    x = 107,502.01

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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.