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Finding the Fourth Proportional to 145,956.66, 201,423.69 and 81,425.40

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Solution

The fourth proportional to 145,956.66, 201,423.69 and 81,425.40 is: 112,369.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,956.66 : 201,423.69 = 81,425.40 : x
  2. Step 2: Convert to fraction form
    145,956.66/201,423.69 = 81,425.40/x
  3. Step 3: Cross multiply
    145,956.66x = 201,423.69 × 81,425.40
  4. Step 4: Simplify right side
    145,956.66x = 16,401,004,527.73
  5. Step 5: Solve for x
    x = 16,401,004,527.73/145,956.66
  6. Step 6: Final answer
    x = 112,369.00

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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.