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Finding the Fourth Proportional to 118,045.78, 162,856.94 and 72,644.95

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Solution

The fourth proportional to 118,045.78, 162,856.94 and 72,644.95 is: 100,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,045.78 : 162,856.94 = 72,644.95 : x
  2. Step 2: Convert to fraction form
    118,045.78/162,856.94 = 72,644.95/x
  3. Step 3: Cross multiply
    118,045.78x = 162,856.94 × 72,644.95
  4. Step 4: Simplify right side
    118,045.78x = 11,830,733,652.74
  5. Step 5: Solve for x
    x = 11,830,733,652.74/118,045.78
  6. Step 6: Final answer
    x = 100,221.57

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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.