Home / 142,125.51-196,131.93-78,461.94

Finding the Fourth Proportional to 142,125.51, 196,131.93 and 78,461.94

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Solution

The fourth proportional to 142,125.51, 196,131.93 and 78,461.94 is: 108,276.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,125.51 : 196,131.93 = 78,461.94 : x
  2. Step 2: Convert to fraction form
    142,125.51/196,131.93 = 78,461.94/x
  3. Step 3: Cross multiply
    142,125.51x = 196,131.93 × 78,461.94
  4. Step 4: Simplify right side
    142,125.51x = 15,388,891,723.74
  5. Step 5: Solve for x
    x = 15,388,891,723.74/142,125.51
  6. Step 6: Final answer
    x = 108,276.77

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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.