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Finding the Fourth Proportional to 134,674.32, 185,851.32 and 78,119.28

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Solution

The fourth proportional to 134,674.32, 185,851.32 and 78,119.28 is: 107,805.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,674.32 : 185,851.32 = 78,119.28 : x
  2. Step 2: Convert to fraction form
    134,674.32/185,851.32 = 78,119.28/x
  3. Step 3: Cross multiply
    134,674.32x = 185,851.32 × 78,119.28
  4. Step 4: Simplify right side
    134,674.32x = 14,518,571,305.45
  5. Step 5: Solve for x
    x = 14,518,571,305.45/134,674.32
  6. Step 6: Final answer
    x = 107,805.05

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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.