Home / 137,509.30-189,776.28-77,080.06

Finding the Fourth Proportional to 137,509.30, 189,776.28 and 77,080.06

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Solution

The fourth proportional to 137,509.30, 189,776.28 and 77,080.06 is: 106,378.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,509.30 : 189,776.28 = 77,080.06 : x
  2. Step 2: Convert to fraction form
    137,509.30/189,776.28 = 77,080.06/x
  3. Step 3: Cross multiply
    137,509.30x = 189,776.28 × 77,080.06
  4. Step 4: Simplify right side
    137,509.30x = 14,627,967,048.98
  5. Step 5: Solve for x
    x = 14,627,967,048.98/137,509.30
  6. Step 6: Final answer
    x = 106,378.02

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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.