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Finding the Fourth Proportional to 91,186.40, 136,779.60 and 75,621.60

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Solution

The fourth proportional to 91,186.40, 136,779.60 and 75,621.60 is: 113,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,186.40 : 136,779.60 = 75,621.60 : x
  2. Step 2: Convert to fraction form
    91,186.40/136,779.60 = 75,621.60/x
  3. Step 3: Cross multiply
    91,186.40x = 136,779.60 × 75,621.60
  4. Step 4: Simplify right side
    91,186.40x = 10,343,492,199.36
  5. Step 5: Solve for x
    x = 10,343,492,199.36/91,186.40
  6. Step 6: Final answer
    x = 113,432.40

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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.