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Finding the Fourth Proportional to 72,509.16, 100,053.90 and 40,243.62

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Solution

The fourth proportional to 72,509.16, 100,053.90 and 40,243.62 is: 55,531.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,509.16 : 100,053.90 = 40,243.62 : x
  2. Step 2: Convert to fraction form
    72,509.16/100,053.90 = 40,243.62/x
  3. Step 3: Cross multiply
    72,509.16x = 100,053.90 × 40,243.62
  4. Step 4: Simplify right side
    72,509.16x = 4,026,531,131.12
  5. Step 5: Solve for x
    x = 4,026,531,131.12/72,509.16
  6. Step 6: Final answer
    x = 55,531.34

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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.