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Finding the Fourth Proportional to 105,032.40, 157,211.40 and 55,041.20

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Solution

The fourth proportional to 105,032.40, 157,211.40 and 55,041.20 is: 82,385.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,032.40 : 157,211.40 = 55,041.20 : x
  2. Step 2: Convert to fraction form
    105,032.40/157,211.40 = 55,041.20/x
  3. Step 3: Cross multiply
    105,032.40x = 157,211.40 × 55,041.20
  4. Step 4: Simplify right side
    105,032.40x = 8,653,104,109.68
  5. Step 5: Solve for x
    x = 8,653,104,109.68/105,032.40
  6. Step 6: Final answer
    x = 82,385.09

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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.