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Finding the Fourth Proportional to 118,398.71, 163,393.43 and 70,679.76

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Solution

The fourth proportional to 118,398.71, 163,393.43 and 70,679.76 is: 97,539.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,398.71 : 163,393.43 = 70,679.76 : x
  2. Step 2: Convert to fraction form
    118,398.71/163,393.43 = 70,679.76/x
  3. Step 3: Cross multiply
    118,398.71x = 163,393.43 × 70,679.76
  4. Step 4: Simplify right side
    118,398.71x = 11,548,608,064.58
  5. Step 5: Solve for x
    x = 11,548,608,064.58/118,398.71
  6. Step 6: Final answer
    x = 97,539.99

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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.