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Finding the Fourth Proportional to 139,036.80, 191,870.40 and 75,374.40

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Solution

The fourth proportional to 139,036.80, 191,870.40 and 75,374.40 is: 104,016.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,036.80 : 191,870.40 = 75,374.40 : x
  2. Step 2: Convert to fraction form
    139,036.80/191,870.40 = 75,374.40/x
  3. Step 3: Cross multiply
    139,036.80x = 191,870.40 × 75,374.40
  4. Step 4: Simplify right side
    139,036.80x = 14,462,116,277.76
  5. Step 5: Solve for x
    x = 14,462,116,277.76/139,036.80
  6. Step 6: Final answer
    x = 104,016.46

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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.