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Finding the Fourth Proportional to 163,749.40, 245,624.11 and 45,420.74

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Solution

The fourth proportional to 163,749.40, 245,624.11 and 45,420.74 is: 68,131.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,749.40 : 245,624.11 = 45,420.74 : x
  2. Step 2: Convert to fraction form
    163,749.40/245,624.11 = 45,420.74/x
  3. Step 3: Cross multiply
    163,749.40x = 245,624.11 × 45,420.74
  4. Step 4: Simplify right side
    163,749.40x = 11,156,429,378.51
  5. Step 5: Solve for x
    x = 11,156,429,378.51/163,749.40
  6. Step 6: Final answer
    x = 68,131.11

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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.