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Finding the Fourth Proportional to 72,558.47, 100,125.19 and 40,721.22

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Solution

The fourth proportional to 72,558.47, 100,125.19 and 40,721.22 is: 56,192.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,558.47 : 100,125.19 = 40,721.22 : x
  2. Step 2: Convert to fraction form
    72,558.47/100,125.19 = 40,721.22/x
  3. Step 3: Cross multiply
    72,558.47x = 100,125.19 × 40,721.22
  4. Step 4: Simplify right side
    72,558.47x = 4,077,219,889.53
  5. Step 5: Solve for x
    x = 4,077,219,889.53/72,558.47
  6. Step 6: Final answer
    x = 56,192.20

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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.