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Finding the Fourth Proportional to 99,061.88, 148,631.74 and 43,619

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Solution

The fourth proportional to 99,061.88, 148,631.74 and 43,619 is: 65,445.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,061.88 : 148,631.74 = 43,619 : x
  2. Step 2: Convert to fraction form
    99,061.88/148,631.74 = 43,619/x
  3. Step 3: Cross multiply
    99,061.88x = 148,631.74 × 43,619
  4. Step 4: Simplify right side
    99,061.88x = 6,483,167,867.06
  5. Step 5: Solve for x
    x = 6,483,167,867.06/99,061.88
  6. Step 6: Final answer
    x = 65,445.64

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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.