Home / 191,840.40-288,106.20-139,309.20

Finding the Fourth Proportional to 191,840.40, 288,106.20 and 139,309.20

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Solution

The fourth proportional to 191,840.40, 288,106.20 and 139,309.20 is: 209,214.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,840.40 : 288,106.20 = 139,309.20 : x
  2. Step 2: Convert to fraction form
    191,840.40/288,106.20 = 139,309.20/x
  3. Step 3: Cross multiply
    191,840.40x = 288,106.20 × 139,309.20
  4. Step 4: Simplify right side
    191,840.40x = 40,135,844,237.04
  5. Step 5: Solve for x
    x = 40,135,844,237.04/191,840.40
  6. Step 6: Final answer
    x = 209,214.77

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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.