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Finding the Fourth Proportional to 90,117.64, 135,070.86 and 36,776.32

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Solution

The fourth proportional to 90,117.64, 135,070.86 and 36,776.32 is: 55,121.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,117.64 : 135,070.86 = 36,776.32 : x
  2. Step 2: Convert to fraction form
    90,117.64/135,070.86 = 36,776.32/x
  3. Step 3: Cross multiply
    90,117.64x = 135,070.86 × 36,776.32
  4. Step 4: Simplify right side
    90,117.64x = 4,967,409,170.04
  5. Step 5: Solve for x
    x = 4,967,409,170.04/90,117.64
  6. Step 6: Final answer
    x = 55,121.39

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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.