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Finding the Fourth Proportional to 103,297.60, 154,946.40 and 85,801.60

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Solution

The fourth proportional to 103,297.60, 154,946.40 and 85,801.60 is: 128,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,297.60 : 154,946.40 = 85,801.60 : x
  2. Step 2: Convert to fraction form
    103,297.60/154,946.40 = 85,801.60/x
  3. Step 3: Cross multiply
    103,297.60x = 154,946.40 × 85,801.60
  4. Step 4: Simplify right side
    103,297.60x = 13,294,649,034.24
  5. Step 5: Solve for x
    x = 13,294,649,034.24/103,297.60
  6. Step 6: Final answer
    x = 128,702.40

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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.