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Finding the Fourth Proportional to 121,508.40, 169,718.10 and 121,508.40

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Solution

The fourth proportional to 121,508.40, 169,718.10 and 121,508.40 is: 169,718.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,508.40 : 169,718.10 = 121,508.40 : x
  2. Step 2: Convert to fraction form
    121,508.40/169,718.10 = 121,508.40/x
  3. Step 3: Cross multiply
    121,508.40x = 169,718.10 × 121,508.40
  4. Step 4: Simplify right side
    121,508.40x = 20,622,174,782.04
  5. Step 5: Solve for x
    x = 20,622,174,782.04/121,508.40
  6. Step 6: Final answer
    x = 169,718.10

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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.