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Finding the Fourth Proportional to 72,437.90, 99,997.02 and 45,619.78

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Solution

The fourth proportional to 72,437.90, 99,997.02 and 45,619.78 is: 62,975.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,437.90 : 99,997.02 = 45,619.78 : x
  2. Step 2: Convert to fraction form
    72,437.90/99,997.02 = 45,619.78/x
  3. Step 3: Cross multiply
    72,437.90x = 99,997.02 × 45,619.78
  4. Step 4: Simplify right side
    72,437.90x = 4,561,842,053.06
  5. Step 5: Solve for x
    x = 4,561,842,053.06/72,437.90
  6. Step 6: Final answer
    x = 62,975.90

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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.