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Finding the Fourth Proportional to 72,607.51, 100,186.61 and 45,380.38

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Solution

The fourth proportional to 72,607.51, 100,186.61 and 45,380.38 is: 62,617.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,607.51 : 100,186.61 = 45,380.38 : x
  2. Step 2: Convert to fraction form
    72,607.51/100,186.61 = 45,380.38/x
  3. Step 3: Cross multiply
    72,607.51x = 100,186.61 × 45,380.38
  4. Step 4: Simplify right side
    72,607.51x = 4,546,506,456.28
  5. Step 5: Solve for x
    x = 4,546,506,456.28/72,607.51
  6. Step 6: Final answer
    x = 62,617.58

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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.