Home / 103,247.10-142,215.53-72,980.39

Finding the Fourth Proportional to 103,247.10, 142,215.53 and 72,980.39

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Solution

The fourth proportional to 103,247.10, 142,215.53 and 72,980.39 is: 100,525.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,247.10 : 142,215.53 = 72,980.39 : x
  2. Step 2: Convert to fraction form
    103,247.10/142,215.53 = 72,980.39/x
  3. Step 3: Cross multiply
    103,247.10x = 142,215.53 × 72,980.39
  4. Step 4: Simplify right side
    103,247.10x = 10,378,944,525.23
  5. Step 5: Solve for x
    x = 10,378,944,525.23/103,247.10
  6. Step 6: Final answer
    x = 100,525.29

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1.5x scale

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.