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Finding the Fourth Proportional to 141,803.80, 212,705.70 and 89,315.80

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Solution

The fourth proportional to 141,803.80, 212,705.70 and 89,315.80 is: 133,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,803.80 : 212,705.70 = 89,315.80 : x
  2. Step 2: Convert to fraction form
    141,803.80/212,705.70 = 89,315.80/x
  3. Step 3: Cross multiply
    141,803.80x = 212,705.70 × 89,315.80
  4. Step 4: Simplify right side
    141,803.80x = 18,997,979,760.06
  5. Step 5: Solve for x
    x = 18,997,979,760.06/141,803.80
  6. Step 6: Final answer
    x = 133,973.70

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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.