Home / 211,172.27-291,283.47-138,579.86

Finding the Fourth Proportional to 211,172.27, 291,283.47 and 138,579.86

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Solution

The fourth proportional to 211,172.27, 291,283.47 and 138,579.86 is: 191,152.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,172.27 : 291,283.47 = 138,579.86 : x
  2. Step 2: Convert to fraction form
    211,172.27/291,283.47 = 138,579.86/x
  3. Step 3: Cross multiply
    211,172.27x = 291,283.47 × 138,579.86
  4. Step 4: Simplify right side
    211,172.27x = 40,366,021,036.50
  5. Step 5: Solve for x
    x = 40,366,021,036.50/211,172.27
  6. Step 6: Final answer
    x = 191,152.10

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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.