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Finding the Fourth Proportional to 159,551.74, 220,181.40 and 87,931.76

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Solution

The fourth proportional to 159,551.74, 220,181.40 and 87,931.76 is: 121,345.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,551.74 : 220,181.40 = 87,931.76 : x
  2. Step 2: Convert to fraction form
    159,551.74/220,181.40 = 87,931.76/x
  3. Step 3: Cross multiply
    159,551.74x = 220,181.40 × 87,931.76
  4. Step 4: Simplify right side
    159,551.74x = 19,360,938,021.26
  5. Step 5: Solve for x
    x = 19,360,938,021.26/159,551.74
  6. Step 6: Final answer
    x = 121,345.83

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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.