Home / 85,637.34-128,289.78-63,107.13

Finding the Fourth Proportional to 85,637.34, 128,289.78 and 63,107.13

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Solution

The fourth proportional to 85,637.34, 128,289.78 and 63,107.13 is: 94,538.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,637.34 : 128,289.78 = 63,107.13 : x
  2. Step 2: Convert to fraction form
    85,637.34/128,289.78 = 63,107.13/x
  3. Step 3: Cross multiply
    85,637.34x = 128,289.78 × 63,107.13
  4. Step 4: Simplify right side
    85,637.34x = 8,095,999,824.13
  5. Step 5: Solve for x
    x = 8,095,999,824.13/85,637.34
  6. Step 6: Final answer
    x = 94,538.20

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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.