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Finding the Fourth Proportional to 100,224.40, 138,243.08 and 64,459.68

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Solution

The fourth proportional to 100,224.40, 138,243.08 and 64,459.68 is: 88,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,224.40 : 138,243.08 = 64,459.68 : x
  2. Step 2: Convert to fraction form
    100,224.40/138,243.08 = 64,459.68/x
  3. Step 3: Cross multiply
    100,224.40x = 138,243.08 × 64,459.68
  4. Step 4: Simplify right side
    100,224.40x = 8,911,104,699.01
  5. Step 5: Solve for x
    x = 8,911,104,699.01/100,224.40
  6. Step 6: Final answer
    x = 88,911.53

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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.