Home / 115,157.90-172,346.70-70,812.74

Finding the Fourth Proportional to 115,157.90, 172,346.70 and 70,812.74

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Solution

The fourth proportional to 115,157.90, 172,346.70 and 70,812.74 is: 105,979.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,157.90 : 172,346.70 = 70,812.74 : x
  2. Step 2: Convert to fraction form
    115,157.90/172,346.70 = 70,812.74/x
  3. Step 3: Cross multiply
    115,157.90x = 172,346.70 × 70,812.74
  4. Step 4: Simplify right side
    115,157.90x = 12,204,342,056.96
  5. Step 5: Solve for x
    x = 12,204,342,056.96/115,157.90
  6. Step 6: Final answer
    x = 105,979.20

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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.