Home / 102,989.72-142,126.18-57,669.68

Finding the Fourth Proportional to 102,989.72, 142,126.18 and 57,669.68

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Solution

The fourth proportional to 102,989.72, 142,126.18 and 57,669.68 is: 79,584.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,989.72 : 142,126.18 = 57,669.68 : x
  2. Step 2: Convert to fraction form
    102,989.72/142,126.18 = 57,669.68/x
  3. Step 3: Cross multiply
    102,989.72x = 142,126.18 × 57,669.68
  4. Step 4: Simplify right side
    102,989.72x = 8,196,371,320.22
  5. Step 5: Solve for x
    x = 8,196,371,320.22/102,989.72
  6. Step 6: Final answer
    x = 79,584.36

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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.