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Finding the Fourth Proportional to 85,564.80, 128,174.40 and 48,585.60

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Solution

The fourth proportional to 85,564.80, 128,174.40 and 48,585.60 is: 72,780.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,564.80 : 128,174.40 = 48,585.60 : x
  2. Step 2: Convert to fraction form
    85,564.80/128,174.40 = 48,585.60/x
  3. Step 3: Cross multiply
    85,564.80x = 128,174.40 × 48,585.60
  4. Step 4: Simplify right side
    85,564.80x = 6,227,430,128.64
  5. Step 5: Solve for x
    x = 6,227,430,128.64/85,564.80
  6. Step 6: Final answer
    x = 72,780.28

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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.