Home / 102,597.02-141,642.79-78,206.51

Finding the Fourth Proportional to 102,597.02, 141,642.79 and 78,206.51

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Solution

The fourth proportional to 102,597.02, 141,642.79 and 78,206.51 is: 107,969.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,597.02 : 141,642.79 = 78,206.51 : x
  2. Step 2: Convert to fraction form
    102,597.02/141,642.79 = 78,206.51/x
  3. Step 3: Cross multiply
    102,597.02x = 141,642.79 × 78,206.51
  4. Step 4: Simplify right side
    102,597.02x = 11,077,388,272.56
  5. Step 5: Solve for x
    x = 11,077,388,272.56/102,597.02
  6. Step 6: Final answer
    x = 107,969.88

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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.