Home / 123,645.24-170,567.64-78,246.72

Finding the Fourth Proportional to 123,645.24, 170,567.64 and 78,246.72

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Solution

The fourth proportional to 123,645.24, 170,567.64 and 78,246.72 is: 107,940.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,645.24 : 170,567.64 = 78,246.72 : x
  2. Step 2: Convert to fraction form
    123,645.24/170,567.64 = 78,246.72/x
  3. Step 3: Cross multiply
    123,645.24x = 170,567.64 × 78,246.72
  4. Step 4: Simplify right side
    123,645.24x = 13,346,358,368.14
  5. Step 5: Solve for x
    x = 13,346,358,368.14/123,645.24
  6. Step 6: Final answer
    x = 107,940.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.