Home / 163,515.10-245,309.10-128,085.70

Finding the Fourth Proportional to 163,515.10, 245,309.10 and 128,085.70

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Solution

The fourth proportional to 163,515.10, 245,309.10 and 128,085.70 is: 192,157.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,515.10 : 245,309.10 = 128,085.70 : x
  2. Step 2: Convert to fraction form
    163,515.10/245,309.10 = 128,085.70/x
  3. Step 3: Cross multiply
    163,515.10x = 245,309.10 × 128,085.70
  4. Step 4: Simplify right side
    163,515.10x = 31,420,587,789.87
  5. Step 5: Solve for x
    x = 31,420,587,789.87/163,515.10
  6. Step 6: Final answer
    x = 192,157.10

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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.