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Finding the Fourth Proportional to 153,616.69, 211,973.92 and 85,628.53

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Solution

The fourth proportional to 153,616.69, 211,973.92 and 85,628.53 is: 118,157.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,616.69 : 211,973.92 = 85,628.53 : x
  2. Step 2: Convert to fraction form
    153,616.69/211,973.92 = 85,628.53/x
  3. Step 3: Cross multiply
    153,616.69x = 211,973.92 × 85,628.53
  4. Step 4: Simplify right side
    153,616.69x = 18,151,015,167.94
  5. Step 5: Solve for x
    x = 18,151,015,167.94/153,616.69
  6. Step 6: Final answer
    x = 118,157.83

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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.