Home / 90,072.16-124,379.28-56,138.56

Finding the Fourth Proportional to 90,072.16, 124,379.28 and 56,138.56

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Solution

The fourth proportional to 90,072.16, 124,379.28 and 56,138.56 is: 77,520.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,072.16 : 124,379.28 = 56,138.56 : x
  2. Step 2: Convert to fraction form
    90,072.16/124,379.28 = 56,138.56/x
  3. Step 3: Cross multiply
    90,072.16x = 124,379.28 × 56,138.56
  4. Step 4: Simplify right side
    90,072.16x = 6,982,473,673.04
  5. Step 5: Solve for x
    x = 6,982,473,673.04/90,072.16
  6. Step 6: Final answer
    x = 77,520.89

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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.