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Finding the Fourth Proportional to 48,705.40, 73,123.80 and 31,209.40

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Solution

The fourth proportional to 48,705.40, 73,123.80 and 31,209.40 is: 46,856.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,705.40 : 73,123.80 = 31,209.40 : x
  2. Step 2: Convert to fraction form
    48,705.40/73,123.80 = 31,209.40/x
  3. Step 3: Cross multiply
    48,705.40x = 73,123.80 × 31,209.40
  4. Step 4: Simplify right side
    48,705.40x = 2,282,149,923.72
  5. Step 5: Solve for x
    x = 2,282,149,923.72/48,705.40
  6. Step 6: Final answer
    x = 46,856.20

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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.