Home / 65,681.15-90,642.20-38,846.66

Finding the Fourth Proportional to 65,681.15, 90,642.20 and 38,846.66

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Solution

The fourth proportional to 65,681.15, 90,642.20 and 38,846.66 is: 53,609.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,681.15 : 90,642.20 = 38,846.66 : x
  2. Step 2: Convert to fraction form
    65,681.15/90,642.20 = 38,846.66/x
  3. Step 3: Cross multiply
    65,681.15x = 90,642.20 × 38,846.66
  4. Step 4: Simplify right side
    65,681.15x = 3,521,146,077.61
  5. Step 5: Solve for x
    x = 3,521,146,077.61/65,681.15
  6. Step 6: Final answer
    x = 53,609.69

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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.