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Finding the Fourth Proportional to 78,899.70, 118,350.15 and 26,309.10

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Solution

The fourth proportional to 78,899.70, 118,350.15 and 26,309.10 is: 39,463.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,899.70 : 118,350.15 = 26,309.10 : x
  2. Step 2: Convert to fraction form
    78,899.70/118,350.15 = 26,309.10/x
  3. Step 3: Cross multiply
    78,899.70x = 118,350.15 × 26,309.10
  4. Step 4: Simplify right side
    78,899.70x = 3,113,685,931.37
  5. Step 5: Solve for x
    x = 3,113,685,931.37/78,899.70
  6. Step 6: Final answer
    x = 39,463.85

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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.