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Finding the Fourth Proportional to 125,477.40, 173,407.68 and 102,780.42

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Solution

The fourth proportional to 125,477.40, 173,407.68 and 102,780.42 is: 142,040.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,477.40 : 173,407.68 = 102,780.42 : x
  2. Step 2: Convert to fraction form
    125,477.40/173,407.68 = 102,780.42/x
  3. Step 3: Cross multiply
    125,477.40x = 173,407.68 × 102,780.42
  4. Step 4: Simplify right side
    125,477.40x = 17,822,914,181.63
  5. Step 5: Solve for x
    x = 17,822,914,181.63/125,477.40
  6. Step 6: Final answer
    x = 142,040.83

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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.