Home / 90,243.12-124,454.70-58,378.80

Finding the Fourth Proportional to 90,243.12, 124,454.70 and 58,378.80

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Solution

The fourth proportional to 90,243.12, 124,454.70 and 58,378.80 is: 80,510.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,243.12 : 124,454.70 = 58,378.80 : x
  2. Step 2: Convert to fraction form
    90,243.12/124,454.70 = 58,378.80/x
  3. Step 3: Cross multiply
    90,243.12x = 124,454.70 × 58,378.80
  4. Step 4: Simplify right side
    90,243.12x = 7,265,516,040.36
  5. Step 5: Solve for x
    x = 7,265,516,040.36/90,243.12
  6. Step 6: Final answer
    x = 80,510.47

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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.