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Finding the Fourth Proportional to 78,845.70, 108,803.07 and 43,035.42

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Solution

The fourth proportional to 78,845.70, 108,803.07 and 43,035.42 is: 59,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,845.70 : 108,803.07 = 43,035.42 : x
  2. Step 2: Convert to fraction form
    78,845.70/108,803.07 = 43,035.42/x
  3. Step 3: Cross multiply
    78,845.70x = 108,803.07 × 43,035.42
  4. Step 4: Simplify right side
    78,845.70x = 4,682,385,814.74
  5. Step 5: Solve for x
    x = 4,682,385,814.74/78,845.70
  6. Step 6: Final answer
    x = 59,386.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.