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Finding the Fourth Proportional to 78,595.81, 108,430.17 and 48,372.01

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Solution

The fourth proportional to 78,595.81, 108,430.17 and 48,372.01 is: 66,733.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,595.81 : 108,430.17 = 48,372.01 : x
  2. Step 2: Convert to fraction form
    78,595.81/108,430.17 = 48,372.01/x
  3. Step 3: Cross multiply
    78,595.81x = 108,430.17 × 48,372.01
  4. Step 4: Simplify right side
    78,595.81x = 5,244,985,267.54
  5. Step 5: Solve for x
    x = 5,244,985,267.54/78,595.81
  6. Step 6: Final answer
    x = 66,733.65

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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.