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Finding the Fourth Proportional to 158,876.02, 219,259.64 and 87,256.79

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Solution

The fourth proportional to 158,876.02, 219,259.64 and 87,256.79 is: 120,420.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,876.02 : 219,259.64 = 87,256.79 : x
  2. Step 2: Convert to fraction form
    158,876.02/219,259.64 = 87,256.79/x
  3. Step 3: Cross multiply
    158,876.02x = 219,259.64 × 87,256.79
  4. Step 4: Simplify right side
    158,876.02x = 19,131,890,830.37
  5. Step 5: Solve for x
    x = 19,131,890,830.37/158,876.02
  6. Step 6: Final answer
    x = 120,420.26

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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.