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Finding the Fourth Proportional to 159,370.64, 219,931.80 and 87,755.60

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Solution

The fourth proportional to 159,370.64, 219,931.80 and 87,755.60 is: 121,102.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,370.64 : 219,931.80 = 87,755.60 : x
  2. Step 2: Convert to fraction form
    159,370.64/219,931.80 = 87,755.60/x
  3. Step 3: Cross multiply
    159,370.64x = 219,931.80 × 87,755.60
  4. Step 4: Simplify right side
    159,370.64x = 19,300,247,068.08
  5. Step 5: Solve for x
    x = 19,300,247,068.08/159,370.64
  6. Step 6: Final answer
    x = 121,102.90

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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.