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Finding the Fourth Proportional to 118,659.36, 163,738.80 and 70,903.20

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Solution

The fourth proportional to 118,659.36, 163,738.80 and 70,903.20 is: 97,839.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,659.36 : 163,738.80 = 70,903.20 : x
  2. Step 2: Convert to fraction form
    118,659.36/163,738.80 = 70,903.20/x
  3. Step 3: Cross multiply
    118,659.36x = 163,738.80 × 70,903.20
  4. Step 4: Simplify right side
    118,659.36x = 11,609,604,884.16
  5. Step 5: Solve for x
    x = 11,609,604,884.16/118,659.36
  6. Step 6: Final answer
    x = 97,839.77

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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.