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Finding the Fourth Proportional to 125,364.51, 187,948.25 and 85,801.68

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Solution

The fourth proportional to 125,364.51, 187,948.25 and 85,801.68 is: 128,635.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,364.51 : 187,948.25 = 85,801.68 : x
  2. Step 2: Convert to fraction form
    125,364.51/187,948.25 = 85,801.68/x
  3. Step 3: Cross multiply
    125,364.51x = 187,948.25 × 85,801.68
  4. Step 4: Simplify right side
    125,364.51x = 16,126,275,495.81
  5. Step 5: Solve for x
    x = 16,126,275,495.81/125,364.51
  6. Step 6: Final answer
    x = 128,635.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.