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Finding the Fourth Proportional to 156,955.86, 216,603.45 and 85,340.79

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Solution

The fourth proportional to 156,955.86, 216,603.45 and 85,340.79 is: 117,772.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,955.86 : 216,603.45 = 85,340.79 : x
  2. Step 2: Convert to fraction form
    156,955.86/216,603.45 = 85,340.79/x
  3. Step 3: Cross multiply
    156,955.86x = 216,603.45 × 85,340.79
  4. Step 4: Simplify right side
    156,955.86x = 18,485,109,539.73
  5. Step 5: Solve for x
    x = 18,485,109,539.73/156,955.86
  6. Step 6: Final answer
    x = 117,772.66

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1.5x scale

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.