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Finding the Fourth Proportional to 79,456.80, 109,643.52 and 45,458.40

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Solution

The fourth proportional to 79,456.80, 109,643.52 and 45,458.40 is: 62,728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,456.80 : 109,643.52 = 45,458.40 : x
  2. Step 2: Convert to fraction form
    79,456.80/109,643.52 = 45,458.40/x
  3. Step 3: Cross multiply
    79,456.80x = 109,643.52 × 45,458.40
  4. Step 4: Simplify right side
    79,456.80x = 4,984,218,989.57
  5. Step 5: Solve for x
    x = 4,984,218,989.57/79,456.80
  6. Step 6: Final answer
    x = 62,728.67

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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.