Home / 209,005.10-288,430.36-118,358.61

Finding the Fourth Proportional to 209,005.10, 288,430.36 and 118,358.61

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Solution

The fourth proportional to 209,005.10, 288,430.36 and 118,358.61 is: 163,336.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,005.10 : 288,430.36 = 118,358.61 : x
  2. Step 2: Convert to fraction form
    209,005.10/288,430.36 = 118,358.61/x
  3. Step 3: Cross multiply
    209,005.10x = 288,430.36 × 118,358.61
  4. Step 4: Simplify right side
    209,005.10x = 34,138,216,195.50
  5. Step 5: Solve for x
    x = 34,138,216,195.50/209,005.10
  6. Step 6: Final answer
    x = 163,336.76

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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.