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Finding the Fourth Proportional to 153,603.12, 211,973.27 and 85,624.41

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Solution

The fourth proportional to 153,603.12, 211,973.27 and 85,624.41 is: 118,162.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,603.12 : 211,973.27 = 85,624.41 : x
  2. Step 2: Convert to fraction form
    153,603.12/211,973.27 = 85,624.41/x
  3. Step 3: Cross multiply
    153,603.12x = 211,973.27 × 85,624.41
  4. Step 4: Simplify right side
    153,603.12x = 18,150,085,751.40
  5. Step 5: Solve for x
    x = 18,150,085,751.40/153,603.12
  6. Step 6: Final answer
    x = 118,162.22

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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.