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Finding the Fourth Proportional to 135,303.89, 186,716.58 and 74,870.94

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Solution

The fourth proportional to 135,303.89, 186,716.58 and 74,870.94 is: 103,320.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,303.89 : 186,716.58 = 74,870.94 : x
  2. Step 2: Convert to fraction form
    135,303.89/186,716.58 = 74,870.94/x
  3. Step 3: Cross multiply
    135,303.89x = 186,716.58 × 74,870.94
  4. Step 4: Simplify right side
    135,303.89x = 13,979,646,277.61
  5. Step 5: Solve for x
    x = 13,979,646,277.61/135,303.89
  6. Step 6: Final answer
    x = 103,320.36

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1.5x scale

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.