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Finding the Fourth Proportional to 72,686.30, 109,029.45 and 47,803.10

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Solution

The fourth proportional to 72,686.30, 109,029.45 and 47,803.10 is: 71,704.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,686.30 : 109,029.45 = 47,803.10 : x
  2. Step 2: Convert to fraction form
    72,686.30/109,029.45 = 47,803.10/x
  3. Step 3: Cross multiply
    72,686.30x = 109,029.45 × 47,803.10
  4. Step 4: Simplify right side
    72,686.30x = 5,211,945,701.30
  5. Step 5: Solve for x
    x = 5,211,945,701.30/72,686.30
  6. Step 6: Final answer
    x = 71,704.65

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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.