Home / 81,189.95-121,782.18-28,598.06

Finding the Fourth Proportional to 81,189.95, 121,782.18 and 28,598.06

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Solution

The fourth proportional to 81,189.95, 121,782.18 and 28,598.06 is: 42,896.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,189.95 : 121,782.18 = 28,598.06 : x
  2. Step 2: Convert to fraction form
    81,189.95/121,782.18 = 28,598.06/x
  3. Step 3: Cross multiply
    81,189.95x = 121,782.18 × 28,598.06
  4. Step 4: Simplify right side
    81,189.95x = 3,482,734,502.27
  5. Step 5: Solve for x
    x = 3,482,734,502.27/81,189.95
  6. Step 6: Final answer
    x = 42,896.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.