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Finding the Fourth Proportional to 91,101.60, 136,652.40 and 28,778.40

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Solution

The fourth proportional to 91,101.60, 136,652.40 and 28,778.40 is: 43,167.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,101.60 : 136,652.40 = 28,778.40 : x
  2. Step 2: Convert to fraction form
    91,101.60/136,652.40 = 28,778.40/x
  3. Step 3: Cross multiply
    91,101.60x = 136,652.40 × 28,778.40
  4. Step 4: Simplify right side
    91,101.60x = 3,932,637,428.16
  5. Step 5: Solve for x
    x = 3,932,637,428.16/91,101.60
  6. Step 6: Final answer
    x = 43,167.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.