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Finding the Fourth Proportional to 139,068.60, 191,913.60 and 75,406.20

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Solution

The fourth proportional to 139,068.60, 191,913.60 and 75,406.20 is: 104,059.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,068.60 : 191,913.60 = 75,406.20 : x
  2. Step 2: Convert to fraction form
    139,068.60/191,913.60 = 75,406.20/x
  3. Step 3: Cross multiply
    139,068.60x = 191,913.60 × 75,406.20
  4. Step 4: Simplify right side
    139,068.60x = 14,471,475,304.32
  5. Step 5: Solve for x
    x = 14,471,475,304.32/139,068.60
  6. Step 6: Final answer
    x = 104,059.98

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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.