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Finding the Fourth Proportional to 100,245.84, 138,259.44 and 64,439.52

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Solution

The fourth proportional to 100,245.84, 138,259.44 and 64,439.52 is: 88,875.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,245.84 : 138,259.44 = 64,439.52 : x
  2. Step 2: Convert to fraction form
    100,245.84/138,259.44 = 64,439.52/x
  3. Step 3: Cross multiply
    100,245.84x = 138,259.44 × 64,439.52
  4. Step 4: Simplify right side
    100,245.84x = 8,909,371,949.07
  5. Step 5: Solve for x
    x = 8,909,371,949.07/100,245.84
  6. Step 6: Final answer
    x = 88,875.23

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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.