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Finding the Fourth Proportional to 219,009.69, 328,373.29 and 85,903.40

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Solution

The fourth proportional to 219,009.69, 328,373.29 and 85,903.40 is: 128,799.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,009.69 : 328,373.29 = 85,903.40 : x
  2. Step 2: Convert to fraction form
    219,009.69/328,373.29 = 85,903.40/x
  3. Step 3: Cross multiply
    219,009.69x = 328,373.29 × 85,903.40
  4. Step 4: Simplify right side
    219,009.69x = 28,208,383,008.50
  5. Step 5: Solve for x
    x = 28,208,383,008.50/219,009.69
  6. Step 6: Final answer
    x = 128,799.70

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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.