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Finding the Fourth Proportional to 111,141.64, 153,301.62 and 79,328.44

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Solution

The fourth proportional to 111,141.64, 153,301.62 and 79,328.44 is: 109,420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,141.64 : 153,301.62 = 79,328.44 : x
  2. Step 2: Convert to fraction form
    111,141.64/153,301.62 = 79,328.44/x
  3. Step 3: Cross multiply
    111,141.64x = 153,301.62 × 79,328.44
  4. Step 4: Simplify right side
    111,141.64x = 12,161,178,364.07
  5. Step 5: Solve for x
    x = 12,161,178,364.07/111,141.64
  6. Step 6: Final answer
    x = 109,420.54

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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.