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Finding the Fourth Proportional to 145,484.40, 200,768.80 and 81,822.40

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Solution

The fourth proportional to 145,484.40, 200,768.80 and 81,822.40 is: 112,915.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,484.40 : 200,768.80 = 81,822.40 : x
  2. Step 2: Convert to fraction form
    145,484.40/200,768.80 = 81,822.40/x
  3. Step 3: Cross multiply
    145,484.40x = 200,768.80 × 81,822.40
  4. Step 4: Simplify right side
    145,484.40x = 16,427,385,061.12
  5. Step 5: Solve for x
    x = 16,427,385,061.12/145,484.40
  6. Step 6: Final answer
    x = 112,915.10

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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.