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Finding the Fourth Proportional to 118,778.50, 163,916.97 and 67,790.21

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Solution

The fourth proportional to 118,778.50, 163,916.97 and 67,790.21 is: 93,552.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,778.50 : 163,916.97 = 67,790.21 : x
  2. Step 2: Convert to fraction form
    118,778.50/163,916.97 = 67,790.21/x
  3. Step 3: Cross multiply
    118,778.50x = 163,916.97 × 67,790.21
  4. Step 4: Simplify right side
    118,778.50x = 11,111,965,818.86
  5. Step 5: Solve for x
    x = 11,111,965,818.86/118,778.50
  6. Step 6: Final answer
    x = 93,552.00

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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.