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Finding the Fourth Proportional to 76,989.60, 115,484.40 and 65,714.40

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Solution

The fourth proportional to 76,989.60, 115,484.40 and 65,714.40 is: 98,571.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,989.60 : 115,484.40 = 65,714.40 : x
  2. Step 2: Convert to fraction form
    76,989.60/115,484.40 = 65,714.40/x
  3. Step 3: Cross multiply
    76,989.60x = 115,484.40 × 65,714.40
  4. Step 4: Simplify right side
    76,989.60x = 7,588,988,055.36
  5. Step 5: Solve for x
    x = 7,588,988,055.36/76,989.60
  6. Step 6: Final answer
    x = 98,571.60

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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.