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Finding the Fourth Proportional to 91,641.44, 126,459.20 and 53,908.40

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Solution

The fourth proportional to 91,641.44, 126,459.20 and 53,908.40 is: 74,390.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,641.44 : 126,459.20 = 53,908.40 : x
  2. Step 2: Convert to fraction form
    91,641.44/126,459.20 = 53,908.40/x
  3. Step 3: Cross multiply
    91,641.44x = 126,459.20 × 53,908.40
  4. Step 4: Simplify right side
    91,641.44x = 6,817,213,137.28
  5. Step 5: Solve for x
    x = 6,817,213,137.28/91,641.44
  6. Step 6: Final answer
    x = 74,390.07

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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.