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Finding the Fourth Proportional to 210,878.83, 316,319.46 and 86,219.83

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Solution

The fourth proportional to 210,878.83, 316,319.46 and 86,219.83 is: 129,330.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,878.83 : 316,319.46 = 86,219.83 : x
  2. Step 2: Convert to fraction form
    210,878.83/316,319.46 = 86,219.83/x
  3. Step 3: Cross multiply
    210,878.83x = 316,319.46 × 86,219.83
  4. Step 4: Simplify right side
    210,878.83x = 27,273,010,066.89
  5. Step 5: Solve for x
    x = 27,273,010,066.89/210,878.83
  6. Step 6: Final answer
    x = 129,330.24

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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.