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Finding the Fourth Proportional to 85,967.60, 128,951.40 and 85,967.60

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Solution

The fourth proportional to 85,967.60, 128,951.40 and 85,967.60 is: 128,951.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967.60 : 128,951.40 = 85,967.60 : x
  2. Step 2: Convert to fraction form
    85,967.60/128,951.40 = 85,967.60/x
  3. Step 3: Cross multiply
    85,967.60x = 128,951.40 × 85,967.60
  4. Step 4: Simplify right side
    85,967.60x = 11,085,642,374.64
  5. Step 5: Solve for x
    x = 11,085,642,374.64/85,967.60
  6. Step 6: Final answer
    x = 128,951.40

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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.