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Finding the Fourth Proportional to 139,089.55, 191,943.63 and 75,427.33

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Solution

The fourth proportional to 139,089.55, 191,943.63 and 75,427.33 is: 104,089.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,089.55 : 191,943.63 = 75,427.33 : x
  2. Step 2: Convert to fraction form
    139,089.55/191,943.63 = 75,427.33/x
  3. Step 3: Cross multiply
    139,089.55x = 191,943.63 × 75,427.33
  4. Step 4: Simplify right side
    139,089.55x = 14,477,795,521.41
  5. Step 5: Solve for x
    x = 14,477,795,521.41/139,089.55
  6. Step 6: Final answer
    x = 104,089.74

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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.