Home / 90,158.36-124,520.64-61,428.20

Finding the Fourth Proportional to 90,158.36, 124,520.64 and 61,428.20

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Solution

The fourth proportional to 90,158.36, 124,520.64 and 61,428.20 is: 84,840.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,158.36 : 124,520.64 = 61,428.20 : x
  2. Step 2: Convert to fraction form
    90,158.36/124,520.64 = 61,428.20/x
  3. Step 3: Cross multiply
    90,158.36x = 124,520.64 × 61,428.20
  4. Step 4: Simplify right side
    90,158.36x = 7,649,078,778.05
  5. Step 5: Solve for x
    x = 7,649,078,778.05/90,158.36
  6. Step 6: Final answer
    x = 84,840.48

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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.