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Finding the Fourth Proportional to 156,978.78, 235,434.96 and 51,772.74

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Solution

The fourth proportional to 156,978.78, 235,434.96 and 51,772.74 is: 77,648.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,978.78 : 235,434.96 = 51,772.74 : x
  2. Step 2: Convert to fraction form
    156,978.78/235,434.96 = 51,772.74/x
  3. Step 3: Cross multiply
    156,978.78x = 235,434.96 × 51,772.74
  4. Step 4: Simplify right side
    156,978.78x = 12,189,112,970.99
  5. Step 5: Solve for x
    x = 12,189,112,970.99/156,978.78
  6. Step 6: Final answer
    x = 77,648.16

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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.