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Finding the Fourth Proportional to 119,088.64, 178,400.76 and 66,339.28

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Solution

The fourth proportional to 119,088.64, 178,400.76 and 66,339.28 is: 99,379.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,088.64 : 178,400.76 = 66,339.28 : x
  2. Step 2: Convert to fraction form
    119,088.64/178,400.76 = 66,339.28/x
  3. Step 3: Cross multiply
    119,088.64x = 178,400.76 × 66,339.28
  4. Step 4: Simplify right side
    119,088.64x = 11,834,977,969.85
  5. Step 5: Solve for x
    x = 11,834,977,969.85/119,088.64
  6. Step 6: Final answer
    x = 99,379.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.