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Finding the Fourth Proportional to 210,815.04, 316,220.88 and 86,068.56

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Solution

The fourth proportional to 210,815.04, 316,220.88 and 86,068.56 is: 129,102.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,815.04 : 316,220.88 = 86,068.56 : x
  2. Step 2: Convert to fraction form
    210,815.04/316,220.88 = 86,068.56/x
  3. Step 3: Cross multiply
    210,815.04x = 316,220.88 × 86,068.56
  4. Step 4: Simplify right side
    210,815.04x = 27,216,675,783.53
  5. Step 5: Solve for x
    x = 27,216,675,783.53/210,815.04
  6. Step 6: Final answer
    x = 129,102.15

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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.