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Finding the Fourth Proportional to 153,603.83, 211,966.53 and 85,628.27

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Solution

The fourth proportional to 153,603.83, 211,966.53 and 85,628.27 is: 118,163.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,603.83 : 211,966.53 = 85,628.27 : x
  2. Step 2: Convert to fraction form
    153,603.83/211,966.53 = 85,628.27/x
  3. Step 3: Cross multiply
    153,603.83x = 211,966.53 × 85,628.27
  4. Step 4: Simplify right side
    153,603.83x = 18,150,327,261.80
  5. Step 5: Solve for x
    x = 18,150,327,261.80/153,603.83
  6. Step 6: Final answer
    x = 118,163.25

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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.