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Finding the Fourth Proportional to 72,900.90, 100,591.06 and 40,628.47

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Solution

The fourth proportional to 72,900.90, 100,591.06 and 40,628.47 is: 56,060.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,900.90 : 100,591.06 = 40,628.47 : x
  2. Step 2: Convert to fraction form
    72,900.90/100,591.06 = 40,628.47/x
  3. Step 3: Cross multiply
    72,900.90x = 100,591.06 × 40,628.47
  4. Step 4: Simplify right side
    72,900.90x = 4,086,860,863.48
  5. Step 5: Solve for x
    x = 4,086,860,863.48/72,900.90
  6. Step 6: Final answer
    x = 56,060.50

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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.