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Finding the Fourth Proportional to 115,639.72, 159,580.74 and 65,337.64

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Solution

The fourth proportional to 115,639.72, 159,580.74 and 65,337.64 is: 90,164.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,639.72 : 159,580.74 = 65,337.64 : x
  2. Step 2: Convert to fraction form
    115,639.72/159,580.74 = 65,337.64/x
  3. Step 3: Cross multiply
    115,639.72x = 159,580.74 × 65,337.64
  4. Step 4: Simplify right side
    115,639.72x = 10,426,628,941.05
  5. Step 5: Solve for x
    x = 10,426,628,941.05/115,639.72
  6. Step 6: Final answer
    x = 90,164.77

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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.