Home / 145,659.11-218,077.83-77,115.36

Finding the Fourth Proportional to 145,659.11, 218,077.83 and 77,115.36

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Solution

The fourth proportional to 145,659.11, 218,077.83 and 77,115.36 is: 115,455.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,659.11 : 218,077.83 = 77,115.36 : x
  2. Step 2: Convert to fraction form
    145,659.11/218,077.83 = 77,115.36/x
  3. Step 3: Cross multiply
    145,659.11x = 218,077.83 × 77,115.36
  4. Step 4: Simplify right side
    145,659.11x = 16,817,150,368.47
  5. Step 5: Solve for x
    x = 16,817,150,368.47/145,659.11
  6. Step 6: Final answer
    x = 115,455.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.