Home / 97,966.80-147,128.40-85,719.60

Finding the Fourth Proportional to 97,966.80, 147,128.40 and 85,719.60

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Solution

The fourth proportional to 97,966.80, 147,128.40 and 85,719.60 is: 128,735.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,966.80 : 147,128.40 = 85,719.60 : x
  2. Step 2: Convert to fraction form
    97,966.80/147,128.40 = 85,719.60/x
  3. Step 3: Cross multiply
    97,966.80x = 147,128.40 × 85,719.60
  4. Step 4: Simplify right side
    97,966.80x = 12,611,787,596.64
  5. Step 5: Solve for x
    x = 12,611,787,596.64/97,966.80
  6. Step 6: Final answer
    x = 128,735.32

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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.