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Finding the Fourth Proportional to 91,446.55, 128,112.65 and 91,446.55

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Solution

The fourth proportional to 91,446.55, 128,112.65 and 91,446.55 is: 128,112.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,446.55 : 128,112.65 = 91,446.55 : x
  2. Step 2: Convert to fraction form
    91,446.55/128,112.65 = 91,446.55/x
  3. Step 3: Cross multiply
    91,446.55x = 128,112.65 × 91,446.55
  4. Step 4: Simplify right side
    91,446.55x = 11,715,459,853.86
  5. Step 5: Solve for x
    x = 11,715,459,853.86/91,446.55
  6. Step 6: Final answer
    x = 128,112.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.