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Finding the Fourth Proportional to 100,293.79, 138,420.68 and 64,010.89

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Solution

The fourth proportional to 100,293.79, 138,420.68 and 64,010.89 is: 88,344.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,293.79 : 138,420.68 = 64,010.89 : x
  2. Step 2: Convert to fraction form
    100,293.79/138,420.68 = 64,010.89/x
  3. Step 3: Cross multiply
    100,293.79x = 138,420.68 × 64,010.89
  4. Step 4: Simplify right side
    100,293.79x = 8,860,430,921.21
  5. Step 5: Solve for x
    x = 8,860,430,921.21/100,293.79
  6. Step 6: Final answer
    x = 88,344.76

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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.