Home / 125,570.40-188,355.60-81,247.20

Finding the Fourth Proportional to 125,570.40, 188,355.60 and 81,247.20

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Solution

The fourth proportional to 125,570.40, 188,355.60 and 81,247.20 is: 121,870.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,570.40 : 188,355.60 = 81,247.20 : x
  2. Step 2: Convert to fraction form
    125,570.40/188,355.60 = 81,247.20/x
  3. Step 3: Cross multiply
    125,570.40x = 188,355.60 × 81,247.20
  4. Step 4: Simplify right side
    125,570.40x = 15,303,365,104.32
  5. Step 5: Solve for x
    x = 15,303,365,104.32/125,570.40
  6. Step 6: Final answer
    x = 121,870.80

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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.