Home / 91,928.02-126,874.40-56,138.78

Finding the Fourth Proportional to 91,928.02, 126,874.40 and 56,138.78

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Solution

The fourth proportional to 91,928.02, 126,874.40 and 56,138.78 is: 77,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,928.02 : 126,874.40 = 56,138.78 : x
  2. Step 2: Convert to fraction form
    91,928.02/126,874.40 = 56,138.78/x
  3. Step 3: Cross multiply
    91,928.02x = 126,874.40 × 56,138.78
  4. Step 4: Simplify right side
    91,928.02x = 7,122,574,029.23
  5. Step 5: Solve for x
    x = 7,122,574,029.23/91,928.02
  6. Step 6: Final answer
    x = 77,479.90

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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.