Home / 103,045.17-142,198.43-57,720.95

Finding the Fourth Proportional to 103,045.17, 142,198.43 and 57,720.95

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Solution

The fourth proportional to 103,045.17, 142,198.43 and 57,720.95 is: 79,652.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,045.17 : 142,198.43 = 57,720.95 : x
  2. Step 2: Convert to fraction form
    103,045.17/142,198.43 = 57,720.95/x
  3. Step 3: Cross multiply
    103,045.17x = 142,198.43 × 57,720.95
  4. Step 4: Simplify right side
    103,045.17x = 8,207,828,468.11
  5. Step 5: Solve for x
    x = 8,207,828,468.11/103,045.17
  6. Step 6: Final answer
    x = 79,652.72

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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.