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Finding the Fourth Proportional to 125,590.16, 189,128.09 and 90,773.12

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Solution

The fourth proportional to 125,590.16, 189,128.09 and 90,773.12 is: 136,696.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,590.16 : 189,128.09 = 90,773.12 : x
  2. Step 2: Convert to fraction form
    125,590.16/189,128.09 = 90,773.12/x
  3. Step 3: Cross multiply
    125,590.16x = 189,128.09 × 90,773.12
  4. Step 4: Simplify right side
    125,590.16x = 17,167,746,808.94
  5. Step 5: Solve for x
    x = 17,167,746,808.94/125,590.16
  6. Step 6: Final answer
    x = 136,696.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.