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Finding the Fourth Proportional to 52,633.40, 78,834.90 and 45,721.40

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Solution

The fourth proportional to 52,633.40, 78,834.90 and 45,721.40 is: 68,482.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,633.40 : 78,834.90 = 45,721.40 : x
  2. Step 2: Convert to fraction form
    52,633.40/78,834.90 = 45,721.40/x
  3. Step 3: Cross multiply
    52,633.40x = 78,834.90 × 45,721.40
  4. Step 4: Simplify right side
    52,633.40x = 3,604,441,996.86
  5. Step 5: Solve for x
    x = 3,604,441,996.86/52,633.40
  6. Step 6: Final answer
    x = 68,482.03

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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.