Home / 85,353.48-128,095.56-38,639.16

Finding the Fourth Proportional to 85,353.48, 128,095.56 and 38,639.16

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Solution

The fourth proportional to 85,353.48, 128,095.56 and 38,639.16 is: 57,988.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,353.48 : 128,095.56 = 38,639.16 : x
  2. Step 2: Convert to fraction form
    85,353.48/128,095.56 = 38,639.16/x
  3. Step 3: Cross multiply
    85,353.48x = 128,095.56 × 38,639.16
  4. Step 4: Simplify right side
    85,353.48x = 4,949,504,838.13
  5. Step 5: Solve for x
    x = 4,949,504,838.13/85,353.48
  6. Step 6: Final answer
    x = 57,988.32

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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.