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Finding the Fourth Proportional to 160,155.75, 240,378.51 and 85,339.09

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Solution

The fourth proportional to 160,155.75, 240,378.51 and 85,339.09 is: 128,085.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,155.75 : 240,378.51 = 85,339.09 : x
  2. Step 2: Convert to fraction form
    160,155.75/240,378.51 = 85,339.09/x
  3. Step 3: Cross multiply
    160,155.75x = 240,378.51 × 85,339.09
  4. Step 4: Simplify right side
    160,155.75x = 20,513,683,018.03
  5. Step 5: Solve for x
    x = 20,513,683,018.03/160,155.75
  6. Step 6: Final answer
    x = 128,085.84

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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.