Home / 205,109.87-307,700.91-70,142.20

Finding the Fourth Proportional to 205,109.87, 307,700.91 and 70,142.20

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Solution

The fourth proportional to 205,109.87, 307,700.91 and 70,142.20 is: 105,225.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,109.87 : 307,700.91 = 70,142.20 : x
  2. Step 2: Convert to fraction form
    205,109.87/307,700.91 = 70,142.20/x
  3. Step 3: Cross multiply
    205,109.87x = 307,700.91 × 70,142.20
  4. Step 4: Simplify right side
    205,109.87x = 21,582,818,000.15
  5. Step 5: Solve for x
    x = 21,582,818,000.15/205,109.87
  6. Step 6: Final answer
    x = 105,225.65

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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.