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Finding the Fourth Proportional to 72,840.76, 100,219.68 and 56,897.56

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Solution

The fourth proportional to 72,840.76, 100,219.68 and 56,897.56 is: 78,283.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,840.76 : 100,219.68 = 56,897.56 : x
  2. Step 2: Convert to fraction form
    72,840.76/100,219.68 = 56,897.56/x
  3. Step 3: Cross multiply
    72,840.76x = 100,219.68 × 56,897.56
  4. Step 4: Simplify right side
    72,840.76x = 5,702,255,255.98
  5. Step 5: Solve for x
    x = 5,702,255,255.98/72,840.76
  6. Step 6: Final answer
    x = 78,283.85

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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.