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Finding the Fourth Proportional to 139,985.08, 210,065.10 and 56,879.08

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Solution

The fourth proportional to 139,985.08, 210,065.10 and 56,879.08 is: 85,354.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,985.08 : 210,065.10 = 56,879.08 : x
  2. Step 2: Convert to fraction form
    139,985.08/210,065.10 = 56,879.08/x
  3. Step 3: Cross multiply
    139,985.08x = 210,065.10 × 56,879.08
  4. Step 4: Simplify right side
    139,985.08x = 11,948,309,628.11
  5. Step 5: Solve for x
    x = 11,948,309,628.11/139,985.08
  6. Step 6: Final answer
    x = 85,354.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.