Home / 67,931.12-101,712-39,809.72

Finding the Fourth Proportional to 67,931.12, 101,712 and 39,809.72

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Solution

The fourth proportional to 67,931.12, 101,712 and 39,809.72 is: 59,606.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,931.12 : 101,712 = 39,809.72 : x
  2. Step 2: Convert to fraction form
    67,931.12/101,712 = 39,809.72/x
  3. Step 3: Cross multiply
    67,931.12x = 101,712 × 39,809.72
  4. Step 4: Simplify right side
    67,931.12x = 4,049,126,240.64
  5. Step 5: Solve for x
    x = 4,049,126,240.64/67,931.12
  6. Step 6: Final answer
    x = 59,606.35

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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.