Home / 139,130.72-191,972.40-88,163.36

Finding the Fourth Proportional to 139,130.72, 191,972.40 and 88,163.36

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Solution

The fourth proportional to 139,130.72, 191,972.40 and 88,163.36 is: 121,647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,130.72 : 191,972.40 = 88,163.36 : x
  2. Step 2: Convert to fraction form
    139,130.72/191,972.40 = 88,163.36/x
  3. Step 3: Cross multiply
    139,130.72x = 191,972.40 × 88,163.36
  4. Step 4: Simplify right side
    139,130.72x = 16,924,931,811.26
  5. Step 5: Solve for x
    x = 16,924,931,811.26/139,130.72
  6. Step 6: Final answer
    x = 121,647.70

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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.