Home / 138,156.84-190,656.10-77,727.52

Finding the Fourth Proportional to 138,156.84, 190,656.10 and 77,727.52

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Solution

The fourth proportional to 138,156.84, 190,656.10 and 77,727.52 is: 107,263.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,156.84 : 190,656.10 = 77,727.52 : x
  2. Step 2: Convert to fraction form
    138,156.84/190,656.10 = 77,727.52/x
  3. Step 3: Cross multiply
    138,156.84x = 190,656.10 × 77,727.52
  4. Step 4: Simplify right side
    138,156.84x = 14,819,225,825.87
  5. Step 5: Solve for x
    x = 14,819,225,825.87/138,156.84
  6. Step 6: Final answer
    x = 107,263.79

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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.