Home / 90,631.08-125,065.08-56,637.72

Finding the Fourth Proportional to 90,631.08, 125,065.08 and 56,637.72

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Solution

The fourth proportional to 90,631.08, 125,065.08 and 56,637.72 is: 78,156.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631.08 : 125,065.08 = 56,637.72 : x
  2. Step 2: Convert to fraction form
    90,631.08/125,065.08 = 56,637.72/x
  3. Step 3: Cross multiply
    90,631.08x = 125,065.08 × 56,637.72
  4. Step 4: Simplify right side
    90,631.08x = 7,083,400,982.82
  5. Step 5: Solve for x
    x = 7,083,400,982.82/90,631.08
  6. Step 6: Final answer
    x = 78,156.42

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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.