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Finding the Fourth Proportional to 72,423.30, 108,683.55 and 42,809.70

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Solution

The fourth proportional to 72,423.30, 108,683.55 and 42,809.70 is: 64,243.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,423.30 : 108,683.55 = 42,809.70 : x
  2. Step 2: Convert to fraction form
    72,423.30/108,683.55 = 42,809.70/x
  3. Step 3: Cross multiply
    72,423.30x = 108,683.55 × 42,809.70
  4. Step 4: Simplify right side
    72,423.30x = 4,652,710,170.44
  5. Step 5: Solve for x
    x = 4,652,710,170.44/72,423.30
  6. Step 6: Final answer
    x = 64,243.28

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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.