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Finding the Fourth Proportional to 159,606.87, 220,258.16 and 87,985.32

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Solution

The fourth proportional to 159,606.87, 220,258.16 and 87,985.32 is: 121,420.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,606.87 : 220,258.16 = 87,985.32 : x
  2. Step 2: Convert to fraction form
    159,606.87/220,258.16 = 87,985.32/x
  3. Step 3: Cross multiply
    159,606.87x = 220,258.16 × 87,985.32
  4. Step 4: Simplify right side
    159,606.87x = 19,379,484,250.28
  5. Step 5: Solve for x
    x = 19,379,484,250.28/159,606.87
  6. Step 6: Final answer
    x = 121,420.11

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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.