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Finding the Fourth Proportional to 121,513.40, 169,725.10 and 121,513.40

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Solution

The fourth proportional to 121,513.40, 169,725.10 and 121,513.40 is: 169,725.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,513.40 : 169,725.10 = 121,513.40 : x
  2. Step 2: Convert to fraction form
    121,513.40/169,725.10 = 121,513.40/x
  3. Step 3: Cross multiply
    121,513.40x = 169,725.10 × 121,513.40
  4. Step 4: Simplify right side
    121,513.40x = 20,623,873,966.34
  5. Step 5: Solve for x
    x = 20,623,873,966.34/121,513.40
  6. Step 6: Final answer
    x = 169,725.10

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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.