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Finding the Fourth Proportional to 272,107.20, 407,820.60 and 139,040.40

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Solution

The fourth proportional to 272,107.20, 407,820.60 and 139,040.40 is: 208,386.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,107.20 : 407,820.60 = 139,040.40 : x
  2. Step 2: Convert to fraction form
    272,107.20/407,820.60 = 139,040.40/x
  3. Step 3: Cross multiply
    272,107.20x = 407,820.60 × 139,040.40
  4. Step 4: Simplify right side
    272,107.20x = 56,703,539,352.24
  5. Step 5: Solve for x
    x = 56,703,539,352.24/272,107.20
  6. Step 6: Final answer
    x = 208,386.77

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1.5x scale

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.