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Finding the Fourth Proportional to 89,901.90, 134,820.45 and 45,513.90

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Solution

The fourth proportional to 89,901.90, 134,820.45 and 45,513.90 is: 68,254.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,901.90 : 134,820.45 = 45,513.90 : x
  2. Step 2: Convert to fraction form
    89,901.90/134,820.45 = 45,513.90/x
  3. Step 3: Cross multiply
    89,901.90x = 134,820.45 × 45,513.90
  4. Step 4: Simplify right side
    89,901.90x = 6,136,204,479.26
  5. Step 5: Solve for x
    x = 6,136,204,479.26/89,901.90
  6. Step 6: Final answer
    x = 68,254.45

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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.