Home / 210,772.38-316,159.10-86,113.38

Finding the Fourth Proportional to 210,772.38, 316,159.10 and 86,113.38

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Solution

The fourth proportional to 210,772.38, 316,159.10 and 86,113.38 is: 129,170.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,772.38 : 316,159.10 = 86,113.38 : x
  2. Step 2: Convert to fraction form
    210,772.38/316,159.10 = 86,113.38/x
  3. Step 3: Cross multiply
    210,772.38x = 316,159.10 × 86,113.38
  4. Step 4: Simplify right side
    210,772.38x = 27,225,528,718.76
  5. Step 5: Solve for x
    x = 27,225,528,718.76/210,772.38
  6. Step 6: Final answer
    x = 129,170.29

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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.