Home / 209,271.31-288,840.27-137,658.40

Finding the Fourth Proportional to 209,271.31, 288,840.27 and 137,658.40

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Solution

The fourth proportional to 209,271.31, 288,840.27 and 137,658.40 is: 189,998.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,271.31 : 288,840.27 = 137,658.40 : x
  2. Step 2: Convert to fraction form
    209,271.31/288,840.27 = 137,658.40/x
  3. Step 3: Cross multiply
    209,271.31x = 288,840.27 × 137,658.40
  4. Step 4: Simplify right side
    209,271.31x = 39,761,289,423.77
  5. Step 5: Solve for x
    x = 39,761,289,423.77/209,271.31
  6. Step 6: Final answer
    x = 189,998.76

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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.