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Finding the Fourth Proportional to 100,641.44, 138,898.32 and 64,935.32

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Solution

The fourth proportional to 100,641.44, 138,898.32 and 64,935.32 is: 89,619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,641.44 : 138,898.32 = 64,935.32 : x
  2. Step 2: Convert to fraction form
    100,641.44/138,898.32 = 64,935.32/x
  3. Step 3: Cross multiply
    100,641.44x = 138,898.32 × 64,935.32
  4. Step 4: Simplify right side
    100,641.44x = 9,019,406,856.66
  5. Step 5: Solve for x
    x = 9,019,406,856.66/100,641.44
  6. Step 6: Final answer
    x = 89,619.22

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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.