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Finding the Fourth Proportional to 100,471.08, 138,630.59 and 64,656.23

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Solution

The fourth proportional to 100,471.08, 138,630.59 and 64,656.23 is: 89,213.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,471.08 : 138,630.59 = 64,656.23 : x
  2. Step 2: Convert to fraction form
    100,471.08/138,630.59 = 64,656.23/x
  3. Step 3: Cross multiply
    100,471.08x = 138,630.59 × 64,656.23
  4. Step 4: Simplify right side
    100,471.08x = 8,963,330,538.10
  5. Step 5: Solve for x
    x = 8,963,330,538.10/100,471.08
  6. Step 6: Final answer
    x = 89,213.04

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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.