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Finding the Fourth Proportional to 125,341.66, 172,971.03 and 77,585.50

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Solution

The fourth proportional to 125,341.66, 172,971.03 and 77,585.50 is: 107,067.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,341.66 : 172,971.03 = 77,585.50 : x
  2. Step 2: Convert to fraction form
    125,341.66/172,971.03 = 77,585.50/x
  3. Step 3: Cross multiply
    125,341.66x = 172,971.03 × 77,585.50
  4. Step 4: Simplify right side
    125,341.66x = 13,420,043,848.07
  5. Step 5: Solve for x
    x = 13,420,043,848.07/125,341.66
  6. Step 6: Final answer
    x = 107,067.70

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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.