Home / 198,999.10-298,498.65-128,140.30

Finding the Fourth Proportional to 198,999.10, 298,498.65 and 128,140.30

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Solution

The fourth proportional to 198,999.10, 298,498.65 and 128,140.30 is: 192,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,999.10 : 298,498.65 = 128,140.30 : x
  2. Step 2: Convert to fraction form
    198,999.10/298,498.65 = 128,140.30/x
  3. Step 3: Cross multiply
    198,999.10x = 298,498.65 × 128,140.30
  4. Step 4: Simplify right side
    198,999.10x = 38,249,706,560.60
  5. Step 5: Solve for x
    x = 38,249,706,560.60/198,999.10
  6. Step 6: Final answer
    x = 192,210.45

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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.