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Finding the Fourth Proportional to 79,478.90, 119,218.06 and 20,314.48

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Solution

The fourth proportional to 79,478.90, 119,218.06 and 20,314.48 is: 30,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478.90 : 119,218.06 = 20,314.48 : x
  2. Step 2: Convert to fraction form
    79,478.90/119,218.06 = 20,314.48/x
  3. Step 3: Cross multiply
    79,478.90x = 119,218.06 × 20,314.48
  4. Step 4: Simplify right side
    79,478.90x = 2,421,852,895.51
  5. Step 5: Solve for x
    x = 2,421,852,895.51/79,478.90
  6. Step 6: Final answer
    x = 30,471.65

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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.