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Finding the Fourth Proportional to 148,957.20, 223,435.80 and 85,971.60

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Solution

The fourth proportional to 148,957.20, 223,435.80 and 85,971.60 is: 128,957.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,957.20 : 223,435.80 = 85,971.60 : x
  2. Step 2: Convert to fraction form
    148,957.20/223,435.80 = 85,971.60/x
  3. Step 3: Cross multiply
    148,957.20x = 223,435.80 × 85,971.60
  4. Step 4: Simplify right side
    148,957.20x = 19,209,133,223.28
  5. Step 5: Solve for x
    x = 19,209,133,223.28/148,957.20
  6. Step 6: Final answer
    x = 128,957.40

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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.