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Finding the Fourth Proportional to 270,140.90, 405,328.90 and 128,085.68

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Solution

The fourth proportional to 270,140.90, 405,328.90 and 128,085.68 is: 192,184.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,140.90 : 405,328.90 = 128,085.68 : x
  2. Step 2: Convert to fraction form
    270,140.90/405,328.90 = 128,085.68/x
  3. Step 3: Cross multiply
    270,140.90x = 405,328.90 × 128,085.68
  4. Step 4: Simplify right side
    270,140.90x = 51,916,827,393.31
  5. Step 5: Solve for x
    x = 51,916,827,393.31/270,140.90
  6. Step 6: Final answer
    x = 192,184.26

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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.