Home / 209,264.31-288,830.61-137,651.40

Finding the Fourth Proportional to 209,264.31, 288,830.61 and 137,651.40

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Solution

The fourth proportional to 209,264.31, 288,830.61 and 137,651.40 is: 189,989.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,264.31 : 288,830.61 = 137,651.40 : x
  2. Step 2: Convert to fraction form
    209,264.31/288,830.61 = 137,651.40/x
  3. Step 3: Cross multiply
    209,264.31x = 288,830.61 × 137,651.40
  4. Step 4: Simplify right side
    209,264.31x = 39,757,937,829.35
  5. Step 5: Solve for x
    x = 39,757,937,829.35/209,264.31
  6. Step 6: Final answer
    x = 189,989.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.