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Finding the Fourth Proportional to 72,437.49, 99,968.54 and 40,608.45

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Solution

The fourth proportional to 72,437.49, 99,968.54 and 40,608.45 is: 56,042.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,437.49 : 99,968.54 = 40,608.45 : x
  2. Step 2: Convert to fraction form
    72,437.49/99,968.54 = 40,608.45/x
  3. Step 3: Cross multiply
    72,437.49x = 99,968.54 × 40,608.45
  4. Step 4: Simplify right side
    72,437.49x = 4,059,567,255.12
  5. Step 5: Solve for x
    x = 4,059,567,255.12/72,437.49
  6. Step 6: Final answer
    x = 56,042.35

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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.