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Finding the Fourth Proportional to 118,433.81, 163,440.79 and 64,721.09

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Solution

The fourth proportional to 118,433.81, 163,440.79 and 64,721.09 is: 89,316.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,433.81 : 163,440.79 = 64,721.09 : x
  2. Step 2: Convert to fraction form
    118,433.81/163,440.79 = 64,721.09/x
  3. Step 3: Cross multiply
    118,433.81x = 163,440.79 × 64,721.09
  4. Step 4: Simplify right side
    118,433.81x = 10,578,065,181.16
  5. Step 5: Solve for x
    x = 10,578,065,181.16/118,433.81
  6. Step 6: Final answer
    x = 89,316.27

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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.