Home / 199,637.10-299,455.65-128,778.30

Finding the Fourth Proportional to 199,637.10, 299,455.65 and 128,778.30

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Solution

The fourth proportional to 199,637.10, 299,455.65 and 128,778.30 is: 193,167.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,637.10 : 299,455.65 = 128,778.30 : x
  2. Step 2: Convert to fraction form
    199,637.10/299,455.65 = 128,778.30/x
  3. Step 3: Cross multiply
    199,637.10x = 299,455.65 × 128,778.30
  4. Step 4: Simplify right side
    199,637.10x = 38,563,389,532.40
  5. Step 5: Solve for x
    x = 38,563,389,532.40/199,637.10
  6. Step 6: Final answer
    x = 193,167.45

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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.