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Finding the Fourth Proportional to 145,270.53, 200,492.01 and 81,608.40

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Solution

The fourth proportional to 145,270.53, 200,492.01 and 81,608.40 is: 112,630.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,270.53 : 200,492.01 = 81,608.40 : x
  2. Step 2: Convert to fraction form
    145,270.53/200,492.01 = 81,608.40/x
  3. Step 3: Cross multiply
    145,270.53x = 200,492.01 × 81,608.40
  4. Step 4: Simplify right side
    145,270.53x = 16,361,832,148.88
  5. Step 5: Solve for x
    x = 16,361,832,148.88/145,270.53
  6. Step 6: Final answer
    x = 112,630.09

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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.