Home / 211,021.52-291,213.36-115,526.72

Finding the Fourth Proportional to 211,021.52, 291,213.36 and 115,526.72

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Solution

The fourth proportional to 211,021.52, 291,213.36 and 115,526.72 is: 159,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,021.52 : 291,213.36 = 115,526.72 : x
  2. Step 2: Convert to fraction form
    211,021.52/291,213.36 = 115,526.72/x
  3. Step 3: Cross multiply
    211,021.52x = 291,213.36 × 115,526.72
  4. Step 4: Simplify right side
    211,021.52x = 33,642,924,300.98
  5. Step 5: Solve for x
    x = 33,642,924,300.98/211,021.52
  6. Step 6: Final answer
    x = 159,428.88

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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.