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Finding the Fourth Proportional to 145,294.36, 200,484.96 and 81,619.48

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Solution

The fourth proportional to 145,294.36, 200,484.96 and 81,619.48 is: 112,622.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,294.36 : 200,484.96 = 81,619.48 : x
  2. Step 2: Convert to fraction form
    145,294.36/200,484.96 = 81,619.48/x
  3. Step 3: Cross multiply
    145,294.36x = 200,484.96 × 81,619.48
  4. Step 4: Simplify right side
    145,294.36x = 16,363,478,183.02
  5. Step 5: Solve for x
    x = 16,363,478,183.02/145,294.36
  6. Step 6: Final answer
    x = 112,622.94

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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.