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Finding the Fourth Proportional to 145,989.64, 201,515.86 and 85,579.72

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Solution

The fourth proportional to 145,989.64, 201,515.86 and 85,579.72 is: 118,129.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,989.64 : 201,515.86 = 85,579.72 : x
  2. Step 2: Convert to fraction form
    145,989.64/201,515.86 = 85,579.72/x
  3. Step 3: Cross multiply
    145,989.64x = 201,515.86 × 85,579.72
  4. Step 4: Simplify right side
    145,989.64x = 17,245,670,874.36
  5. Step 5: Solve for x
    x = 17,245,670,874.36/145,989.64
  6. Step 6: Final answer
    x = 118,129.42

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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.