Home / 111,638.09-154,074-63,890.42

Finding the Fourth Proportional to 111,638.09, 154,074 and 63,890.42

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Solution

The fourth proportional to 111,638.09, 154,074 and 63,890.42 is: 88,176.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,638.09 : 154,074 = 63,890.42 : x
  2. Step 2: Convert to fraction form
    111,638.09/154,074 = 63,890.42/x
  3. Step 3: Cross multiply
    111,638.09x = 154,074 × 63,890.42
  4. Step 4: Simplify right side
    111,638.09x = 9,843,851,800.71
  5. Step 5: Solve for x
    x = 9,843,851,800.71/111,638.09
  6. Step 6: Final answer
    x = 88,176.47

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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.