Home / 85,801.10-128,570.07-38,999.30

Finding the Fourth Proportional to 85,801.10, 128,570.07 and 38,999.30

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Solution

The fourth proportional to 85,801.10, 128,570.07 and 38,999.30 is: 58,439.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,801.10 : 128,570.07 = 38,999.30 : x
  2. Step 2: Convert to fraction form
    85,801.10/128,570.07 = 38,999.30/x
  3. Step 3: Cross multiply
    85,801.10x = 128,570.07 × 38,999.30
  4. Step 4: Simplify right side
    85,801.10x = 5,014,142,730.95
  5. Step 5: Solve for x
    x = 5,014,142,730.95/85,801.10
  6. Step 6: Final answer
    x = 58,439.14

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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.