Home / 138,440.61-191,048.04-74,778.40

Finding the Fourth Proportional to 138,440.61, 191,048.04 and 74,778.40

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Solution

The fourth proportional to 138,440.61, 191,048.04 and 74,778.40 is: 103,194.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,440.61 : 191,048.04 = 74,778.40 : x
  2. Step 2: Convert to fraction form
    138,440.61/191,048.04 = 74,778.40/x
  3. Step 3: Cross multiply
    138,440.61x = 191,048.04 × 74,778.40
  4. Step 4: Simplify right side
    138,440.61x = 14,286,267,472.12
  5. Step 5: Solve for x
    x = 14,286,267,472.12/138,440.61
  6. Step 6: Final answer
    x = 103,194.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.