Home / 130,642.14-180,270-79,636.44

Finding the Fourth Proportional to 130,642.14, 180,270 and 79,636.44

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Solution

The fourth proportional to 130,642.14, 180,270 and 79,636.44 is: 109,888.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,642.14 : 180,270 = 79,636.44 : x
  2. Step 2: Convert to fraction form
    130,642.14/180,270 = 79,636.44/x
  3. Step 3: Cross multiply
    130,642.14x = 180,270 × 79,636.44
  4. Step 4: Simplify right side
    130,642.14x = 14,356,061,038.80
  5. Step 5: Solve for x
    x = 14,356,061,038.80/130,642.14
  6. Step 6: Final answer
    x = 109,888.44

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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.