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Finding the Fourth Proportional to 127,485.21, 175,933.91 and 70,128.80

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Solution

The fourth proportional to 127,485.21, 175,933.91 and 70,128.80 is: 96,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,485.21 : 175,933.91 = 70,128.80 : x
  2. Step 2: Convert to fraction form
    127,485.21/175,933.91 = 70,128.80/x
  3. Step 3: Cross multiply
    127,485.21x = 175,933.91 × 70,128.80
  4. Step 4: Simplify right side
    127,485.21x = 12,338,032,757.29
  5. Step 5: Solve for x
    x = 12,338,032,757.29/127,485.21
  6. Step 6: Final answer
    x = 96,780.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.