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Finding the Fourth Proportional to 139,029.12, 191,858.40 and 75,366.72

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Solution

The fourth proportional to 139,029.12, 191,858.40 and 75,366.72 is: 104,005.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,029.12 : 191,858.40 = 75,366.72 : x
  2. Step 2: Convert to fraction form
    139,029.12/191,858.40 = 75,366.72/x
  3. Step 3: Cross multiply
    139,029.12x = 191,858.40 × 75,366.72
  4. Step 4: Simplify right side
    139,029.12x = 14,459,738,312.45
  5. Step 5: Solve for x
    x = 14,459,738,312.45/139,029.12
  6. Step 6: Final answer
    x = 104,005.11

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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.