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Finding the Fourth Proportional to 153,947.22, 212,446.53 and 86,878.74

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Solution

The fourth proportional to 153,947.22, 212,446.53 and 86,878.74 is: 119,892.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,947.22 : 212,446.53 = 86,878.74 : x
  2. Step 2: Convert to fraction form
    153,947.22/212,446.53 = 86,878.74/x
  3. Step 3: Cross multiply
    153,947.22x = 212,446.53 × 86,878.74
  4. Step 4: Simplify right side
    153,947.22x = 18,457,086,843.77
  5. Step 5: Solve for x
    x = 18,457,086,843.77/153,947.22
  6. Step 6: Final answer
    x = 119,892.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.