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Finding the Fourth Proportional to 99,642.73, 148,803.62 and 87,570.49

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Solution

The fourth proportional to 99,642.73, 148,803.62 and 87,570.49 is: 130,775.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,642.73 : 148,803.62 = 87,570.49 : x
  2. Step 2: Convert to fraction form
    99,642.73/148,803.62 = 87,570.49/x
  3. Step 3: Cross multiply
    99,642.73x = 148,803.62 × 87,570.49
  4. Step 4: Simplify right side
    99,642.73x = 13,030,805,917.17
  5. Step 5: Solve for x
    x = 13,030,805,917.17/99,642.73
  6. Step 6: Final answer
    x = 130,775.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.