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Finding the Fourth Proportional to 118,364, 163,342.30 and 64,649.16

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Solution

The fourth proportional to 118,364, 163,342.30 and 64,649.16 is: 89,215.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,364 : 163,342.30 = 64,649.16 : x
  2. Step 2: Convert to fraction form
    118,364/163,342.30 = 64,649.16/x
  3. Step 3: Cross multiply
    118,364x = 163,342.30 × 64,649.16
  4. Step 4: Simplify right side
    118,364x = 10,559,942,487.47
  5. Step 5: Solve for x
    x = 10,559,942,487.47/118,364
  6. Step 6: Final answer
    x = 89,215.83

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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.