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Finding the Fourth Proportional to 48,609.80, 72,914.70 and 40,315.40

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Solution

The fourth proportional to 48,609.80, 72,914.70 and 40,315.40 is: 60,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,609.80 : 72,914.70 = 40,315.40 : x
  2. Step 2: Convert to fraction form
    48,609.80/72,914.70 = 40,315.40/x
  3. Step 3: Cross multiply
    48,609.80x = 72,914.70 × 40,315.40
  4. Step 4: Simplify right side
    48,609.80x = 2,939,585,296.38
  5. Step 5: Solve for x
    x = 2,939,585,296.38/48,609.80
  6. Step 6: Final answer
    x = 60,473.10

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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.