Home / 139,985.10-193,124.30-86,176.62

Finding the Fourth Proportional to 139,985.10, 193,124.30 and 86,176.62

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Solution

The fourth proportional to 139,985.10, 193,124.30 and 86,176.62 is: 118,889.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,985.10 : 193,124.30 = 86,176.62 : x
  2. Step 2: Convert to fraction form
    139,985.10/193,124.30 = 86,176.62/x
  3. Step 3: Cross multiply
    139,985.10x = 193,124.30 × 86,176.62
  4. Step 4: Simplify right side
    139,985.10x = 16,642,798,982.98
  5. Step 5: Solve for x
    x = 16,642,798,982.98/139,985.10
  6. Step 6: Final answer
    x = 118,889.79

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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.