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Finding the Fourth Proportional to 153,362.16, 211,571.60 and 89,671.86

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Solution

The fourth proportional to 153,362.16, 211,571.60 and 89,671.86 is: 123,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,362.16 : 211,571.60 = 89,671.86 : x
  2. Step 2: Convert to fraction form
    153,362.16/211,571.60 = 89,671.86/x
  3. Step 3: Cross multiply
    153,362.16x = 211,571.60 × 89,671.86
  4. Step 4: Simplify right side
    153,362.16x = 18,972,018,446.82
  5. Step 5: Solve for x
    x = 18,972,018,446.82/153,362.16
  6. Step 6: Final answer
    x = 123,707.30

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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.