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Finding the Fourth Proportional to 159,485.10, 220,089.65 and 86,887.64

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Solution

The fourth proportional to 159,485.10, 220,089.65 and 86,887.64 is: 119,905.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,485.10 : 220,089.65 = 86,887.64 : x
  2. Step 2: Convert to fraction form
    159,485.10/220,089.65 = 86,887.64/x
  3. Step 3: Cross multiply
    159,485.10x = 220,089.65 × 86,887.64
  4. Step 4: Simplify right side
    159,485.10x = 19,123,068,742.04
  5. Step 5: Solve for x
    x = 19,123,068,742.04/159,485.10
  6. Step 6: Final answer
    x = 119,905.05

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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.