Home / 138,470.06-191,088.78-74,807.84

Finding the Fourth Proportional to 138,470.06, 191,088.78 and 74,807.84

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Solution

The fourth proportional to 138,470.06, 191,088.78 and 74,807.84 is: 103,234.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,470.06 : 191,088.78 = 74,807.84 : x
  2. Step 2: Convert to fraction form
    138,470.06/191,088.78 = 74,807.84/x
  3. Step 3: Cross multiply
    138,470.06x = 191,088.78 × 74,807.84
  4. Step 4: Simplify right side
    138,470.06x = 14,294,938,880.04
  5. Step 5: Solve for x
    x = 14,294,938,880.04/138,470.06
  6. Step 6: Final answer
    x = 103,234.87

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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.