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Finding the Fourth Proportional to 112,771.65, 155,641.46 and 65,015.67

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Solution

The fourth proportional to 112,771.65, 155,641.46 and 65,015.67 is: 89,731.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,771.65 : 155,641.46 = 65,015.67 : x
  2. Step 2: Convert to fraction form
    112,771.65/155,641.46 = 65,015.67/x
  3. Step 3: Cross multiply
    112,771.65x = 155,641.46 × 65,015.67
  4. Step 4: Simplify right side
    112,771.65x = 10,119,133,476.60
  5. Step 5: Solve for x
    x = 10,119,133,476.60/112,771.65
  6. Step 6: Final answer
    x = 89,731.18

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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.