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Finding the Fourth Proportional to 96,606.70, 144,910.05 and 85,720.30

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Solution

The fourth proportional to 96,606.70, 144,910.05 and 85,720.30 is: 128,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,606.70 : 144,910.05 = 85,720.30 : x
  2. Step 2: Convert to fraction form
    96,606.70/144,910.05 = 85,720.30/x
  3. Step 3: Cross multiply
    96,606.70x = 144,910.05 × 85,720.30
  4. Step 4: Simplify right side
    96,606.70x = 12,421,732,959.02
  5. Step 5: Solve for x
    x = 12,421,732,959.02/96,606.70
  6. Step 6: Final answer
    x = 128,580.45

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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.