Home / 84,635.20-126,952.80-53,142.40

Finding the Fourth Proportional to 84,635.20, 126,952.80 and 53,142.40

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Solution

The fourth proportional to 84,635.20, 126,952.80 and 53,142.40 is: 79,713.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,635.20 : 126,952.80 = 53,142.40 : x
  2. Step 2: Convert to fraction form
    84,635.20/126,952.80 = 53,142.40/x
  3. Step 3: Cross multiply
    84,635.20x = 126,952.80 × 53,142.40
  4. Step 4: Simplify right side
    84,635.20x = 6,746,576,478.72
  5. Step 5: Solve for x
    x = 6,746,576,478.72/84,635.20
  6. Step 6: Final answer
    x = 79,713.60

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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.