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Finding the Fourth Proportional to 210,908.52, 291,053.78 and 115,415.23

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Solution

The fourth proportional to 210,908.52, 291,053.78 and 115,415.23 is: 159,273.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,908.52 : 291,053.78 = 115,415.23 : x
  2. Step 2: Convert to fraction form
    210,908.52/291,053.78 = 115,415.23/x
  3. Step 3: Cross multiply
    210,908.52x = 291,053.78 × 115,415.23
  4. Step 4: Simplify right side
    210,908.52x = 33,592,038,961.07
  5. Step 5: Solve for x
    x = 33,592,038,961.07/210,908.52
  6. Step 6: Final answer
    x = 159,273.03

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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.