Home / 191,464.40-287,542.20-138,933.20

Finding the Fourth Proportional to 191,464.40, 287,542.20 and 138,933.20

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Solution

The fourth proportional to 191,464.40, 287,542.20 and 138,933.20 is: 208,650.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,464.40 : 287,542.20 = 138,933.20 : x
  2. Step 2: Convert to fraction form
    191,464.40/287,542.20 = 138,933.20/x
  3. Step 3: Cross multiply
    191,464.40x = 287,542.20 × 138,933.20
  4. Step 4: Simplify right side
    191,464.40x = 39,949,157,981.04
  5. Step 5: Solve for x
    x = 39,949,157,981.04/191,464.40
  6. Step 6: Final answer
    x = 208,650.58

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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.