Home / 85,688.80-128,533.20-26,542.60

Finding the Fourth Proportional to 85,688.80, 128,533.20 and 26,542.60

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Solution

The fourth proportional to 85,688.80, 128,533.20 and 26,542.60 is: 39,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,688.80 : 128,533.20 = 26,542.60 : x
  2. Step 2: Convert to fraction form
    85,688.80/128,533.20 = 26,542.60/x
  3. Step 3: Cross multiply
    85,688.80x = 128,533.20 × 26,542.60
  4. Step 4: Simplify right side
    85,688.80x = 3,411,605,314.32
  5. Step 5: Solve for x
    x = 3,411,605,314.32/85,688.80
  6. Step 6: Final answer
    x = 39,813.90

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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.