Home / 85,931.06-128,844.81-38,537.57

Finding the Fourth Proportional to 85,931.06, 128,844.81 and 38,537.57

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Solution

The fourth proportional to 85,931.06, 128,844.81 and 38,537.57 is: 57,783.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931.06 : 128,844.81 = 38,537.57 : x
  2. Step 2: Convert to fraction form
    85,931.06/128,844.81 = 38,537.57/x
  3. Step 3: Cross multiply
    85,931.06x = 128,844.81 × 38,537.57
  4. Step 4: Simplify right side
    85,931.06x = 4,965,365,884.51
  5. Step 5: Solve for x
    x = 4,965,365,884.51/85,931.06
  6. Step 6: Final answer
    x = 57,783.13

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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.