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Finding the Fourth Proportional to 169,970.40, 254,437.20 and 99,640.80

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Solution

The fourth proportional to 169,970.40, 254,437.20 and 99,640.80 is: 149,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,970.40 : 254,437.20 = 99,640.80 : x
  2. Step 2: Convert to fraction form
    169,970.40/254,437.20 = 99,640.80/x
  3. Step 3: Cross multiply
    169,970.40x = 254,437.20 × 99,640.80
  4. Step 4: Simplify right side
    169,970.40x = 25,352,326,157.76
  5. Step 5: Solve for x
    x = 25,352,326,157.76/169,970.40
  6. Step 6: Final answer
    x = 149,157.30

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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.