Home / 78,516.55-108,351.93-42,705.79

Finding the Fourth Proportional to 78,516.55, 108,351.93 and 42,705.79

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Solution

The fourth proportional to 78,516.55, 108,351.93 and 42,705.79 is: 58,933.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,516.55 : 108,351.93 = 42,705.79 : x
  2. Step 2: Convert to fraction form
    78,516.55/108,351.93 = 42,705.79/x
  3. Step 3: Cross multiply
    78,516.55x = 108,351.93 × 42,705.79
  4. Step 4: Simplify right side
    78,516.55x = 4,627,254,768.67
  5. Step 5: Solve for x
    x = 4,627,254,768.67/78,516.55
  6. Step 6: Final answer
    x = 58,933.50

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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.