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Finding the Fourth Proportional to 145,040.58, 217,560.57 and 81,832.01

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Solution

The fourth proportional to 145,040.58, 217,560.57 and 81,832.01 is: 122,747.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,040.58 : 217,560.57 = 81,832.01 : x
  2. Step 2: Convert to fraction form
    145,040.58/217,560.57 = 81,832.01/x
  3. Step 3: Cross multiply
    145,040.58x = 217,560.57 × 81,832.01
  4. Step 4: Simplify right side
    145,040.58x = 17,803,417,652.04
  5. Step 5: Solve for x
    x = 17,803,417,652.04/145,040.58
  6. Step 6: Final answer
    x = 122,747.84

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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.