Home / 144,642.06-216,995.80-78,080.76

Finding the Fourth Proportional to 144,642.06, 216,995.80 and 78,080.76

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Solution

The fourth proportional to 144,642.06, 216,995.80 and 78,080.76 is: 117,138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,642.06 : 216,995.80 = 78,080.76 : x
  2. Step 2: Convert to fraction form
    144,642.06/216,995.80 = 78,080.76/x
  3. Step 3: Cross multiply
    144,642.06x = 216,995.80 × 78,080.76
  4. Step 4: Simplify right side
    144,642.06x = 16,943,196,980.81
  5. Step 5: Solve for x
    x = 16,943,196,980.81/144,642.06
  6. Step 6: Final answer
    x = 117,138.80

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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.