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Finding the Fourth Proportional to 121,112.40, 169,695.60 and 121,112.40

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Solution

The fourth proportional to 121,112.40, 169,695.60 and 121,112.40 is: 169,695.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,112.40 : 169,695.60 = 121,112.40 : x
  2. Step 2: Convert to fraction form
    121,112.40/169,695.60 = 121,112.40/x
  3. Step 3: Cross multiply
    121,112.40x = 169,695.60 × 121,112.40
  4. Step 4: Simplify right side
    121,112.40x = 20,552,241,385.44
  5. Step 5: Solve for x
    x = 20,552,241,385.44/121,112.40
  6. Step 6: Final answer
    x = 169,695.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.