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Finding the Fourth Proportional to 248,438.48, 372,663.81 and 90,666.90

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Solution

The fourth proportional to 248,438.48, 372,663.81 and 90,666.90 is: 136,002.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,438.48 : 372,663.81 = 90,666.90 : x
  2. Step 2: Convert to fraction form
    248,438.48/372,663.81 = 90,666.90/x
  3. Step 3: Cross multiply
    248,438.48x = 372,663.81 × 90,666.90
  4. Step 4: Simplify right side
    248,438.48x = 33,788,272,394.89
  5. Step 5: Solve for x
    x = 33,788,272,394.89/248,438.48
  6. Step 6: Final answer
    x = 136,002.58

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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.