Home / 78,364.68-108,145.12-42,556.20

Finding the Fourth Proportional to 78,364.68, 108,145.12 and 42,556.20

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Solution

The fourth proportional to 78,364.68, 108,145.12 and 42,556.20 is: 58,728.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,364.68 : 108,145.12 = 42,556.20 : x
  2. Step 2: Convert to fraction form
    78,364.68/108,145.12 = 42,556.20/x
  3. Step 3: Cross multiply
    78,364.68x = 108,145.12 × 42,556.20
  4. Step 4: Simplify right side
    78,364.68x = 4,602,245,355.74
  5. Step 5: Solve for x
    x = 4,602,245,355.74/78,364.68
  6. Step 6: Final answer
    x = 58,728.57

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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.