Home / 134,590.16-185,740.68-78,019.28

Finding the Fourth Proportional to 134,590.16, 185,740.68 and 78,019.28

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Solution

The fourth proportional to 134,590.16, 185,740.68 and 78,019.28 is: 107,670.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,590.16 : 185,740.68 = 78,019.28 : x
  2. Step 2: Convert to fraction form
    134,590.16/185,740.68 = 78,019.28/x
  3. Step 3: Cross multiply
    134,590.16x = 185,740.68 × 78,019.28
  4. Step 4: Simplify right side
    134,590.16x = 14,491,354,120.31
  5. Step 5: Solve for x
    x = 14,491,354,120.31/134,590.16
  6. Step 6: Final answer
    x = 107,670.23

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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.