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Finding the Fourth Proportional to 111,130.68, 153,358.79 and 63,384.81

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Solution

The fourth proportional to 111,130.68, 153,358.79 and 63,384.81 is: 87,470.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,130.68 : 153,358.79 = 63,384.81 : x
  2. Step 2: Convert to fraction form
    111,130.68/153,358.79 = 63,384.81/x
  3. Step 3: Cross multiply
    111,130.68x = 153,358.79 × 63,384.81
  4. Step 4: Simplify right side
    111,130.68x = 9,720,617,449.06
  5. Step 5: Solve for x
    x = 9,720,617,449.06/111,130.68
  6. Step 6: Final answer
    x = 87,470.15

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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.