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Finding the Fourth Proportional to 141,985.31, 212,959.53 and 42,143.49

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Solution

The fourth proportional to 141,985.31, 212,959.53 and 42,143.49 is: 63,209.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,985.31 : 212,959.53 = 42,143.49 : x
  2. Step 2: Convert to fraction form
    141,985.31/212,959.53 = 42,143.49/x
  3. Step 3: Cross multiply
    141,985.31x = 212,959.53 × 42,143.49
  4. Step 4: Simplify right side
    141,985.31x = 8,974,857,822.96
  5. Step 5: Solve for x
    x = 8,974,857,822.96/141,985.31
  6. Step 6: Final answer
    x = 63,209.77

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