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Finding the Fourth Proportional to 111,130.68, 153,358.76 and 63,384.83

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Solution

The fourth proportional to 111,130.68, 153,358.76 and 63,384.83 is: 87,470.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,130.68 : 153,358.76 = 63,384.83 : x
  2. Step 2: Convert to fraction form
    111,130.68/153,358.76 = 63,384.83/x
  3. Step 3: Cross multiply
    111,130.68x = 153,358.76 × 63,384.83
  4. Step 4: Simplify right side
    111,130.68x = 9,720,618,323.28
  5. Step 5: Solve for x
    x = 9,720,618,323.28/111,130.68
  6. Step 6: Final answer
    x = 87,470.16

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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.