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Finding the Fourth Proportional to 151,459.70, 209,014.39 and 87,834.40

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Solution

The fourth proportional to 151,459.70, 209,014.39 and 87,834.40 is: 121,211.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,459.70 : 209,014.39 = 87,834.40 : x
  2. Step 2: Convert to fraction form
    151,459.70/209,014.39 = 87,834.40/x
  3. Step 3: Cross multiply
    151,459.70x = 209,014.39 × 87,834.40
  4. Step 4: Simplify right side
    151,459.70x = 18,358,653,124.27
  5. Step 5: Solve for x
    x = 18,358,653,124.27/151,459.70
  6. Step 6: Final answer
    x = 121,211.48

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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.