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Finding the Fourth Proportional to 210,887.55, 316,331.46 and 86,228.55

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Solution

The fourth proportional to 210,887.55, 316,331.46 and 86,228.55 is: 129,342.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,887.55 : 316,331.46 = 86,228.55 : x
  2. Step 2: Convert to fraction form
    210,887.55/316,331.46 = 86,228.55/x
  3. Step 3: Cross multiply
    210,887.55x = 316,331.46 × 86,228.55
  4. Step 4: Simplify right side
    210,887.55x = 27,276,803,115.18
  5. Step 5: Solve for x
    x = 27,276,803,115.18/210,887.55
  6. Step 6: Final answer
    x = 129,342.88

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1.5x scale

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.