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Finding the Fourth Proportional to 117,459.86, 161,975.52 and 100,520.34

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Solution

The fourth proportional to 117,459.86, 161,975.52 and 100,520.34 is: 138,616.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,459.86 : 161,975.52 = 100,520.34 : x
  2. Step 2: Convert to fraction form
    117,459.86/161,975.52 = 100,520.34/x
  3. Step 3: Cross multiply
    117,459.86x = 161,975.52 × 100,520.34
  4. Step 4: Simplify right side
    117,459.86x = 16,281,834,342.08
  5. Step 5: Solve for x
    x = 16,281,834,342.08/117,459.86
  6. Step 6: Final answer
    x = 138,616.16

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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.