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Finding the Fourth Proportional to 72,710.76, 100,291.86 and 45,887.61

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Solution

The fourth proportional to 72,710.76, 100,291.86 and 45,887.61 is: 63,293.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,710.76 : 100,291.86 = 45,887.61 : x
  2. Step 2: Convert to fraction form
    72,710.76/100,291.86 = 45,887.61/x
  3. Step 3: Cross multiply
    72,710.76x = 100,291.86 × 45,887.61
  4. Step 4: Simplify right side
    72,710.76x = 4,602,153,757.85
  5. Step 5: Solve for x
    x = 4,602,153,757.85/72,710.76
  6. Step 6: Final answer
    x = 63,293.99

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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.