Home / 145,660.08-201,007.81-81,129.11

Finding the Fourth Proportional to 145,660.08, 201,007.81 and 81,129.11

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Solution

The fourth proportional to 145,660.08, 201,007.81 and 81,129.11 is: 111,956.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,660.08 : 201,007.81 = 81,129.11 : x
  2. Step 2: Convert to fraction form
    145,660.08/201,007.81 = 81,129.11/x
  3. Step 3: Cross multiply
    145,660.08x = 201,007.81 × 81,129.11
  4. Step 4: Simplify right side
    145,660.08x = 16,307,584,728.35
  5. Step 5: Solve for x
    x = 16,307,584,728.35/145,660.08
  6. Step 6: Final answer
    x = 111,956.44

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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.