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Finding the Fourth Proportional to 134,574.56, 185,710.44 and 77,991.20

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Solution

The fourth proportional to 134,574.56, 185,710.44 and 77,991.20 is: 107,626.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,574.56 : 185,710.44 = 77,991.20 : x
  2. Step 2: Convert to fraction form
    134,574.56/185,710.44 = 77,991.20/x
  3. Step 3: Cross multiply
    134,574.56x = 185,710.44 × 77,991.20
  4. Step 4: Simplify right side
    134,574.56x = 14,483,780,068.13
  5. Step 5: Solve for x
    x = 14,483,780,068.13/134,574.56
  6. Step 6: Final answer
    x = 107,626.43

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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.