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Finding the Fourth Proportional to 111,103.72, 153,343.08 and 62,720.39

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Solution

The fourth proportional to 111,103.72, 153,343.08 and 62,720.39 is: 86,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,103.72 : 153,343.08 = 62,720.39 : x
  2. Step 2: Convert to fraction form
    111,103.72/153,343.08 = 62,720.39/x
  3. Step 3: Cross multiply
    111,103.72x = 153,343.08 × 62,720.39
  4. Step 4: Simplify right side
    111,103.72x = 9,617,738,055.80
  5. Step 5: Solve for x
    x = 9,617,738,055.80/111,103.72
  6. Step 6: Final answer
    x = 86,565.40

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1.5x scale

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.