Home / 138,870.52-191,627.62-77,605.40

Finding the Fourth Proportional to 138,870.52, 191,627.62 and 77,605.40

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Solution

The fourth proportional to 138,870.52, 191,627.62 and 77,605.40 is: 107,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,870.52 : 191,627.62 = 77,605.40 : x
  2. Step 2: Convert to fraction form
    138,870.52/191,627.62 = 77,605.40/x
  3. Step 3: Cross multiply
    138,870.52x = 191,627.62 × 77,605.40
  4. Step 4: Simplify right side
    138,870.52x = 14,871,338,101.15
  5. Step 5: Solve for x
    x = 14,871,338,101.15/138,870.52
  6. Step 6: Final answer
    x = 107,087.80

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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.