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Finding the Fourth Proportional to 72,244.80, 108,384.12 and 30,152.40

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Solution

The fourth proportional to 72,244.80, 108,384.12 and 30,152.40 is: 45,235.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,244.80 : 108,384.12 = 30,152.40 : x
  2. Step 2: Convert to fraction form
    72,244.80/108,384.12 = 30,152.40/x
  3. Step 3: Cross multiply
    72,244.80x = 108,384.12 × 30,152.40
  4. Step 4: Simplify right side
    72,244.80x = 3,268,041,339.89
  5. Step 5: Solve for x
    x = 3,268,041,339.89/72,244.80
  6. Step 6: Final answer
    x = 45,235.66

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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.