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Finding the Fourth Proportional to 288,665.91, 432,888.17 and 99,090.95

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Solution

The fourth proportional to 288,665.91, 432,888.17 and 99,090.95 is: 148,598.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,665.91 : 432,888.17 = 99,090.95 : x
  2. Step 2: Convert to fraction form
    288,665.91/432,888.17 = 99,090.95/x
  3. Step 3: Cross multiply
    288,665.91x = 432,888.17 × 99,090.95
  4. Step 4: Simplify right side
    288,665.91x = 42,895,297,349.17
  5. Step 5: Solve for x
    x = 42,895,297,349.17/288,665.91
  6. Step 6: Final answer
    x = 148,598.42

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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.