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Finding the Fourth Proportional to 121,538.40, 169,760.10 and 121,538.40

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Solution

The fourth proportional to 121,538.40, 169,760.10 and 121,538.40 is: 169,760.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,538.40 : 169,760.10 = 121,538.40 : x
  2. Step 2: Convert to fraction form
    121,538.40/169,760.10 = 121,538.40/x
  3. Step 3: Cross multiply
    121,538.40x = 169,760.10 × 121,538.40
  4. Step 4: Simplify right side
    121,538.40x = 20,632,370,937.84
  5. Step 5: Solve for x
    x = 20,632,370,937.84/121,538.40
  6. Step 6: Final answer
    x = 169,760.10

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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.