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Finding the Fourth Proportional to 47,139.54, 70,678.11 and 18,657.63

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Solution

The fourth proportional to 47,139.54, 70,678.11 and 18,657.63 is: 27,974.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,139.54 : 70,678.11 = 18,657.63 : x
  2. Step 2: Convert to fraction form
    47,139.54/70,678.11 = 18,657.63/x
  3. Step 3: Cross multiply
    47,139.54x = 70,678.11 × 18,657.63
  4. Step 4: Simplify right side
    47,139.54x = 1,318,686,025.48
  5. Step 5: Solve for x
    x = 1,318,686,025.48/47,139.54
  6. Step 6: Final answer
    x = 27,974.10

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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.