Home / 111,421.61-153,747.66-63,678.05

Finding the Fourth Proportional to 111,421.61, 153,747.66 and 63,678.05

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Solution

The fourth proportional to 111,421.61, 153,747.66 and 63,678.05 is: 87,867.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,421.61 : 153,747.66 = 63,678.05 : x
  2. Step 2: Convert to fraction form
    111,421.61/153,747.66 = 63,678.05/x
  3. Step 3: Cross multiply
    111,421.61x = 153,747.66 × 63,678.05
  4. Step 4: Simplify right side
    111,421.61x = 9,790,351,804.02
  5. Step 5: Solve for x
    x = 9,790,351,804.02/111,421.61
  6. Step 6: Final answer
    x = 87,867.62

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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.