Home / 115,005.40-172,346.10-91,353.40

Finding the Fourth Proportional to 115,005.40, 172,346.10 and 91,353.40

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Solution

The fourth proportional to 115,005.40, 172,346.10 and 91,353.40 is: 136,901.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,005.40 : 172,346.10 = 91,353.40 : x
  2. Step 2: Convert to fraction form
    115,005.40/172,346.10 = 91,353.40/x
  3. Step 3: Cross multiply
    115,005.40x = 172,346.10 × 91,353.40
  4. Step 4: Simplify right side
    115,005.40x = 15,744,402,211.74
  5. Step 5: Solve for x
    x = 15,744,402,211.74/115,005.40
  6. Step 6: Final answer
    x = 136,901.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.