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Finding the Fourth Proportional to 118,570.95, 163,695.61 and 78,401.22

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Solution

The fourth proportional to 118,570.95, 163,695.61 and 78,401.22 is: 108,238.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,570.95 : 163,695.61 = 78,401.22 : x
  2. Step 2: Convert to fraction form
    118,570.95/163,695.61 = 78,401.22/x
  3. Step 3: Cross multiply
    118,570.95x = 163,695.61 × 78,401.22
  4. Step 4: Simplify right side
    118,570.95x = 12,833,936,177.47
  5. Step 5: Solve for x
    x = 12,833,936,177.47/118,570.95
  6. Step 6: Final answer
    x = 108,238.46

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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.