Home / 78,050.18-107,709.38-42,240.23

Finding the Fourth Proportional to 78,050.18, 107,709.38 and 42,240.23

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Solution

The fourth proportional to 78,050.18, 107,709.38 and 42,240.23 is: 58,291.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,050.18 : 107,709.38 = 42,240.23 : x
  2. Step 2: Convert to fraction form
    78,050.18/107,709.38 = 42,240.23/x
  3. Step 3: Cross multiply
    78,050.18x = 107,709.38 × 42,240.23
  4. Step 4: Simplify right side
    78,050.18x = 4,549,668,551.41
  5. Step 5: Solve for x
    x = 4,549,668,551.41/78,050.18
  6. Step 6: Final answer
    x = 58,291.58

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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.