Home / 136,821.12-188,810.40-77,205.12

Finding the Fourth Proportional to 136,821.12, 188,810.40 and 77,205.12

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Solution

The fourth proportional to 136,821.12, 188,810.40 and 77,205.12 is: 106,541.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,821.12 : 188,810.40 = 77,205.12 : x
  2. Step 2: Convert to fraction form
    136,821.12/188,810.40 = 77,205.12/x
  3. Step 3: Cross multiply
    136,821.12x = 188,810.40 × 77,205.12
  4. Step 4: Simplify right side
    136,821.12x = 14,577,129,589.25
  5. Step 5: Solve for x
    x = 14,577,129,589.25/136,821.12
  6. Step 6: Final answer
    x = 106,541.52

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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.