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Finding the Fourth Proportional to 139,041.64, 191,877.72 and 75,379.72

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Solution

The fourth proportional to 139,041.64, 191,877.72 and 75,379.72 is: 104,024.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,041.64 : 191,877.72 = 75,379.72 : x
  2. Step 2: Convert to fraction form
    139,041.64/191,877.72 = 75,379.72/x
  3. Step 3: Cross multiply
    139,041.64x = 191,877.72 × 75,379.72
  4. Step 4: Simplify right side
    139,041.64x = 14,463,688,807.84
  5. Step 5: Solve for x
    x = 14,463,688,807.84/139,041.64
  6. Step 6: Final answer
    x = 104,024.15

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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.