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Finding the Fourth Proportional to 141,814.80, 212,721.98 and 65,871.81

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Solution

The fourth proportional to 141,814.80, 212,721.98 and 65,871.81 is: 98,807.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,814.80 : 212,721.98 = 65,871.81 : x
  2. Step 2: Convert to fraction form
    141,814.80/212,721.98 = 65,871.81/x
  3. Step 3: Cross multiply
    141,814.80x = 212,721.98 × 65,871.81
  4. Step 4: Simplify right side
    141,814.80x = 14,012,381,520.02
  5. Step 5: Solve for x
    x = 14,012,381,520.02/141,814.80
  6. Step 6: Final answer
    x = 98,807.61

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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.