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Finding the Fourth Proportional to 121,129.40, 169,719.40 and 121,129.40

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Solution

The fourth proportional to 121,129.40, 169,719.40 and 121,129.40 is: 169,719.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,129.40 : 169,719.40 = 121,129.40 : x
  2. Step 2: Convert to fraction form
    121,129.40/169,719.40 = 121,129.40/x
  3. Step 3: Cross multiply
    121,129.40x = 169,719.40 × 121,129.40
  4. Step 4: Simplify right side
    121,129.40x = 20,558,009,090.36
  5. Step 5: Solve for x
    x = 20,558,009,090.36/121,129.40
  6. Step 6: Final answer
    x = 169,719.40

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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.