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Finding the Fourth Proportional to 210,935.04, 316,453.32 and 86,276.40

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Solution

The fourth proportional to 210,935.04, 316,453.32 and 86,276.40 is: 129,435.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,935.04 : 316,453.32 = 86,276.40 : x
  2. Step 2: Convert to fraction form
    210,935.04/316,453.32 = 86,276.40/x
  3. Step 3: Cross multiply
    210,935.04x = 316,453.32 × 86,276.40
  4. Step 4: Simplify right side
    210,935.04x = 27,302,453,217.65
  5. Step 5: Solve for x
    x = 27,302,453,217.65/210,935.04
  6. Step 6: Final answer
    x = 129,435.36

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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.