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Finding the Fourth Proportional to 100,293.83, 138,420.73 and 64,010.94

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Solution

The fourth proportional to 100,293.83, 138,420.73 and 64,010.94 is: 88,344.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,293.83 : 138,420.73 = 64,010.94 : x
  2. Step 2: Convert to fraction form
    100,293.83/138,420.73 = 64,010.94/x
  3. Step 3: Cross multiply
    100,293.83x = 138,420.73 × 64,010.94
  4. Step 4: Simplify right side
    100,293.83x = 8,860,441,042.79
  5. Step 5: Solve for x
    x = 8,860,441,042.79/100,293.83
  6. Step 6: Final answer
    x = 88,344.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.