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Finding the Fourth Proportional to 79,478.70, 119,109.51 and 40,062.48

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Solution

The fourth proportional to 79,478.70, 119,109.51 and 40,062.48 is: 60,039.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478.70 : 119,109.51 = 40,062.48 : x
  2. Step 2: Convert to fraction form
    79,478.70/119,109.51 = 40,062.48/x
  3. Step 3: Cross multiply
    79,478.70x = 119,109.51 × 40,062.48
  4. Step 4: Simplify right side
    79,478.70x = 4,771,822,362.18
  5. Step 5: Solve for x
    x = 4,771,822,362.18/79,478.70
  6. Step 6: Final answer
    x = 60,039.01

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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.