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Finding the Fourth Proportional to 72,416.80, 108,673.80 and 42,803.20

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Solution

The fourth proportional to 72,416.80, 108,673.80 and 42,803.20 is: 64,233.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,416.80 : 108,673.80 = 42,803.20 : x
  2. Step 2: Convert to fraction form
    72,416.80/108,673.80 = 42,803.20/x
  3. Step 3: Cross multiply
    72,416.80x = 108,673.80 × 42,803.20
  4. Step 4: Simplify right side
    72,416.80x = 4,651,586,396.16
  5. Step 5: Solve for x
    x = 4,651,586,396.16/72,416.80
  6. Step 6: Final answer
    x = 64,233.53

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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.