Home / 90,840.48-125,289.12-77,456.16

Finding the Fourth Proportional to 90,840.48, 125,289.12 and 77,456.16

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Solution

The fourth proportional to 90,840.48, 125,289.12 and 77,456.16 is: 106,829.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,840.48 : 125,289.12 = 77,456.16 : x
  2. Step 2: Convert to fraction form
    90,840.48/125,289.12 = 77,456.16/x
  3. Step 3: Cross multiply
    90,840.48x = 125,289.12 × 77,456.16
  4. Step 4: Simplify right side
    90,840.48x = 9,704,414,124.98
  5. Step 5: Solve for x
    x = 9,704,414,124.98/90,840.48
  6. Step 6: Final answer
    x = 106,829.18

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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.