Home / 210,789.12-316,184.22-86,130.12

Finding the Fourth Proportional to 210,789.12, 316,184.22 and 86,130.12

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Solution

The fourth proportional to 210,789.12, 316,184.22 and 86,130.12 is: 129,195.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,789.12 : 316,184.22 = 86,130.12 : x
  2. Step 2: Convert to fraction form
    210,789.12/316,184.22 = 86,130.12/x
  3. Step 3: Cross multiply
    210,789.12x = 316,184.22 × 86,130.12
  4. Step 4: Simplify right side
    210,789.12x = 27,232,984,810.71
  5. Step 5: Solve for x
    x = 27,232,984,810.71/210,789.12
  6. Step 6: Final answer
    x = 129,195.40

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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.