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Finding the Fourth Proportional to 261,995.70, 392,993.55 and 75,007.20

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Solution

The fourth proportional to 261,995.70, 392,993.55 and 75,007.20 is: 112,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,995.70 : 392,993.55 = 75,007.20 : x
  2. Step 2: Convert to fraction form
    261,995.70/392,993.55 = 75,007.20/x
  3. Step 3: Cross multiply
    261,995.70x = 392,993.55 × 75,007.20
  4. Step 4: Simplify right side
    261,995.70x = 29,477,345,803.56
  5. Step 5: Solve for x
    x = 29,477,345,803.56/261,995.70
  6. Step 6: Final answer
    x = 112,510.80

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1.5x scale

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.