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Finding the Fourth Proportional to 99,130, 136,797.78 and 56,687.08

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Solution

The fourth proportional to 99,130, 136,797.78 and 56,687.08 is: 78,227.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,130 : 136,797.78 = 56,687.08 : x
  2. Step 2: Convert to fraction form
    99,130/136,797.78 = 56,687.08/x
  3. Step 3: Cross multiply
    99,130x = 136,797.78 × 56,687.08
  4. Step 4: Simplify right side
    99,130x = 7,754,666,698.68
  5. Step 5: Solve for x
    x = 7,754,666,698.68/99,130
  6. Step 6: Final answer
    x = 78,227.24

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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.