Home / 315,091.12-472,634.24-78,432.24

Finding the Fourth Proportional to 315,091.12, 472,634.24 and 78,432.24

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Solution

The fourth proportional to 315,091.12, 472,634.24 and 78,432.24 is: 117,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,091.12 : 472,634.24 = 78,432.24 : x
  2. Step 2: Convert to fraction form
    315,091.12/472,634.24 = 78,432.24/x
  3. Step 3: Cross multiply
    315,091.12x = 472,634.24 × 78,432.24
  4. Step 4: Simplify right side
    315,091.12x = 37,069,762,143.90
  5. Step 5: Solve for x
    x = 37,069,762,143.90/315,091.12
  6. Step 6: Final answer
    x = 117,647.75

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1.5x scale

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.