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Finding the Fourth Proportional to 142,700.76, 212,795.01 and 132,728.04

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Solution

The fourth proportional to 142,700.76, 212,795.01 and 132,728.04 is: 197,923.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,700.76 : 212,795.01 = 132,728.04 : x
  2. Step 2: Convert to fraction form
    142,700.76/212,795.01 = 132,728.04/x
  3. Step 3: Cross multiply
    142,700.76x = 212,795.01 × 132,728.04
  4. Step 4: Simplify right side
    142,700.76x = 28,243,864,599.08
  5. Step 5: Solve for x
    x = 28,243,864,599.08/142,700.76
  6. Step 6: Final answer
    x = 197,923.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.