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Finding the Fourth Proportional to 85,683.70, 128,547.72 and 50,175.02

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Solution

The fourth proportional to 85,683.70, 128,547.72 and 50,175.02 is: 75,275.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,683.70 : 128,547.72 = 50,175.02 : x
  2. Step 2: Convert to fraction form
    85,683.70/128,547.72 = 50,175.02/x
  3. Step 3: Cross multiply
    85,683.70x = 128,547.72 × 50,175.02
  4. Step 4: Simplify right side
    85,683.70x = 6,449,884,452.34
  5. Step 5: Solve for x
    x = 6,449,884,452.34/85,683.70
  6. Step 6: Final answer
    x = 75,275.51

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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.