Home / 103,218.30-142,509.78-79,302.24

Finding the Fourth Proportional to 103,218.30, 142,509.78 and 79,302.24

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Solution

The fourth proportional to 103,218.30, 142,509.78 and 79,302.24 is: 109,489.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,218.30 : 142,509.78 = 79,302.24 : x
  2. Step 2: Convert to fraction form
    103,218.30/142,509.78 = 79,302.24/x
  3. Step 3: Cross multiply
    103,218.30x = 142,509.78 × 79,302.24
  4. Step 4: Simplify right side
    103,218.30x = 11,301,344,775.91
  5. Step 5: Solve for x
    x = 11,301,344,775.91/103,218.30
  6. Step 6: Final answer
    x = 109,489.74

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1.5x scale

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.