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Finding the Fourth Proportional to 100,341.94, 138,352.17 and 64,533.46

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Solution

The fourth proportional to 100,341.94, 138,352.17 and 64,533.46 is: 88,979.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,341.94 : 138,352.17 = 64,533.46 : x
  2. Step 2: Convert to fraction form
    100,341.94/138,352.17 = 64,533.46/x
  3. Step 3: Cross multiply
    100,341.94x = 138,352.17 × 64,533.46
  4. Step 4: Simplify right side
    100,341.94x = 8,928,344,228.61
  5. Step 5: Solve for x
    x = 8,928,344,228.61/100,341.94
  6. Step 6: Final answer
    x = 88,979.19

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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.