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Finding the Fourth Proportional to 219,030.10, 328,545.15 and 85,914.70

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Solution

The fourth proportional to 219,030.10, 328,545.15 and 85,914.70 is: 128,872.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,030.10 : 328,545.15 = 85,914.70 : x
  2. Step 2: Convert to fraction form
    219,030.10/328,545.15 = 85,914.70/x
  3. Step 3: Cross multiply
    219,030.10x = 328,545.15 × 85,914.70
  4. Step 4: Simplify right side
    219,030.10x = 28,226,857,998.71
  5. Step 5: Solve for x
    x = 28,226,857,998.71/219,030.10
  6. Step 6: Final answer
    x = 128,872.05

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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.