Home / 121,478.10-182,218.06-79,378.36

Finding the Fourth Proportional to 121,478.10, 182,218.06 and 79,378.36

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Solution

The fourth proportional to 121,478.10, 182,218.06 and 79,378.36 is: 119,068.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,478.10 : 182,218.06 = 79,378.36 : x
  2. Step 2: Convert to fraction form
    121,478.10/182,218.06 = 79,378.36/x
  3. Step 3: Cross multiply
    121,478.10x = 182,218.06 × 79,378.36
  4. Step 4: Simplify right side
    121,478.10x = 14,464,170,765.18
  5. Step 5: Solve for x
    x = 14,464,170,765.18/121,478.10
  6. Step 6: Final answer
    x = 119,068.13

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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.