Home / 145,932.75-201,387.47-78,864.75

Finding the Fourth Proportional to 145,932.75, 201,387.47 and 78,864.75

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Solution

The fourth proportional to 145,932.75, 201,387.47 and 78,864.75 is: 108,833.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,932.75 : 201,387.47 = 78,864.75 : x
  2. Step 2: Convert to fraction form
    145,932.75/201,387.47 = 78,864.75/x
  3. Step 3: Cross multiply
    145,932.75x = 201,387.47 × 78,864.75
  4. Step 4: Simplify right side
    145,932.75x = 15,882,372,080.36
  5. Step 5: Solve for x
    x = 15,882,372,080.36/145,932.75
  6. Step 6: Final answer
    x = 108,833.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.