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Finding the Fourth Proportional to 159,360, 219,916.80 and 88,704

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Solution

The fourth proportional to 159,360, 219,916.80 and 88,704 is: 122,411.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,360 : 219,916.80 = 88,704 : x
  2. Step 2: Convert to fraction form
    159,360/219,916.80 = 88,704/x
  3. Step 3: Cross multiply
    159,360x = 219,916.80 × 88,704
  4. Step 4: Simplify right side
    159,360x = 19,507,499,827.20
  5. Step 5: Solve for x
    x = 19,507,499,827.20/159,360
  6. Step 6: Final answer
    x = 122,411.52

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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.