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Finding the Fourth Proportional to 125,428.16, 173,090.72 and 68,839.68

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Solution

The fourth proportional to 125,428.16, 173,090.72 and 68,839.68 is: 94,998.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,428.16 : 173,090.72 = 68,839.68 : x
  2. Step 2: Convert to fraction form
    125,428.16/173,090.72 = 68,839.68/x
  3. Step 3: Cross multiply
    125,428.16x = 173,090.72 × 68,839.68
  4. Step 4: Simplify right side
    125,428.16x = 11,915,509,775.77
  5. Step 5: Solve for x
    x = 11,915,509,775.77/125,428.16
  6. Step 6: Final answer
    x = 94,998.68

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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.