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Finding the Fourth Proportional to 139,360.40, 209,970.32 and 126,048.72

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Solution

The fourth proportional to 139,360.40, 209,970.32 and 126,048.72 is: 189,913.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,360.40 : 209,970.32 = 126,048.72 : x
  2. Step 2: Convert to fraction form
    139,360.40/209,970.32 = 126,048.72/x
  3. Step 3: Cross multiply
    139,360.40x = 209,970.32 × 126,048.72
  4. Step 4: Simplify right side
    139,360.40x = 26,466,490,073.99
  5. Step 5: Solve for x
    x = 26,466,490,073.99/139,360.40
  6. Step 6: Final answer
    x = 189,913.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.