Home / 65,490.81-98,215.56-21,108.08

Finding the Fourth Proportional to 65,490.81, 98,215.56 and 21,108.08

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Solution

The fourth proportional to 65,490.81, 98,215.56 and 21,108.08 is: 31,655.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,490.81 : 98,215.56 = 21,108.08 : x
  2. Step 2: Convert to fraction form
    65,490.81/98,215.56 = 21,108.08/x
  3. Step 3: Cross multiply
    65,490.81x = 98,215.56 × 21,108.08
  4. Step 4: Simplify right side
    65,490.81x = 2,073,141,406.65
  5. Step 5: Solve for x
    x = 2,073,141,406.65/65,490.81
  6. Step 6: Final answer
    x = 31,655.46

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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.