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Finding the Fourth Proportional to 99,031.61, 148,213.90 and 90,837.65

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Solution

The fourth proportional to 99,031.61, 148,213.90 and 90,837.65 is: 135,950.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,031.61 : 148,213.90 = 90,837.65 : x
  2. Step 2: Convert to fraction form
    99,031.61/148,213.90 = 90,837.65/x
  3. Step 3: Cross multiply
    99,031.61x = 148,213.90 × 90,837.65
  4. Step 4: Simplify right side
    99,031.61x = 13,463,402,857.42
  5. Step 5: Solve for x
    x = 13,463,402,857.42/99,031.61
  6. Step 6: Final answer
    x = 135,950.56

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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.