Home / 78,320.37-108,079.22-42,509.61

Finding the Fourth Proportional to 78,320.37, 108,079.22 and 42,509.61

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Solution

The fourth proportional to 78,320.37, 108,079.22 and 42,509.61 is: 58,661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,320.37 : 108,079.22 = 42,509.61 : x
  2. Step 2: Convert to fraction form
    78,320.37/108,079.22 = 42,509.61/x
  3. Step 3: Cross multiply
    78,320.37x = 108,079.22 × 42,509.61
  4. Step 4: Simplify right side
    78,320.37x = 4,594,405,548.95
  5. Step 5: Solve for x
    x = 4,594,405,548.95/78,320.37
  6. Step 6: Final answer
    x = 58,661.69

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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.