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Finding the Fourth Proportional to 84,870.60, 127,289.70 and 25,708.20

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Solution

The fourth proportional to 84,870.60, 127,289.70 and 25,708.20 is: 38,557.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,870.60 : 127,289.70 = 25,708.20 : x
  2. Step 2: Convert to fraction form
    84,870.60/127,289.70 = 25,708.20/x
  3. Step 3: Cross multiply
    84,870.60x = 127,289.70 × 25,708.20
  4. Step 4: Simplify right side
    84,870.60x = 3,272,389,065.54
  5. Step 5: Solve for x
    x = 3,272,389,065.54/84,870.60
  6. Step 6: Final answer
    x = 38,557.39

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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.