Home / 90,638.16-125,140.92-56,697.84

Finding the Fourth Proportional to 90,638.16, 125,140.92 and 56,697.84

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Solution

The fourth proportional to 90,638.16, 125,140.92 and 56,697.84 is: 78,280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,638.16 : 125,140.92 = 56,697.84 : x
  2. Step 2: Convert to fraction form
    90,638.16/125,140.92 = 56,697.84/x
  3. Step 3: Cross multiply
    90,638.16x = 125,140.92 × 56,697.84
  4. Step 4: Simplify right side
    90,638.16x = 7,095,219,859.61
  5. Step 5: Solve for x
    x = 7,095,219,859.61/90,638.16
  6. Step 6: Final answer
    x = 78,280.71

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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.