Home / 145,142.18-200,294.45-81,478.34

Finding the Fourth Proportional to 145,142.18, 200,294.45 and 81,478.34

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Solution

The fourth proportional to 145,142.18, 200,294.45 and 81,478.34 is: 112,439.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,142.18 : 200,294.45 = 81,478.34 : x
  2. Step 2: Convert to fraction form
    145,142.18/200,294.45 = 81,478.34/x
  3. Step 3: Cross multiply
    145,142.18x = 200,294.45 × 81,478.34
  4. Step 4: Simplify right side
    145,142.18x = 16,319,659,297.21
  5. Step 5: Solve for x
    x = 16,319,659,297.21/145,142.18
  6. Step 6: Final answer
    x = 112,439.12

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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.