Home / 149,013.28-205,639.80-85,349.74

Finding the Fourth Proportional to 149,013.28, 205,639.80 and 85,349.74

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Solution

The fourth proportional to 149,013.28, 205,639.80 and 85,349.74 is: 117,783.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,013.28 : 205,639.80 = 85,349.74 : x
  2. Step 2: Convert to fraction form
    149,013.28/205,639.80 = 85,349.74/x
  3. Step 3: Cross multiply
    149,013.28x = 205,639.80 × 85,349.74
  4. Step 4: Simplify right side
    149,013.28x = 17,551,303,463.65
  5. Step 5: Solve for x
    x = 17,551,303,463.65/149,013.28
  6. Step 6: Final answer
    x = 117,783.49

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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.