Home / 137,397.20-189,615.16-76,981.28

Finding the Fourth Proportional to 137,397.20, 189,615.16 and 76,981.28

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Solution

The fourth proportional to 137,397.20, 189,615.16 and 76,981.28 is: 106,238.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,397.20 : 189,615.16 = 76,981.28 : x
  2. Step 2: Convert to fraction form
    137,397.20/189,615.16 = 76,981.28/x
  3. Step 3: Cross multiply
    137,397.20x = 189,615.16 × 76,981.28
  4. Step 4: Simplify right side
    137,397.20x = 14,596,817,724.20
  5. Step 5: Solve for x
    x = 14,596,817,724.20/137,397.20
  6. Step 6: Final answer
    x = 106,238.10

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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.