Home / 90,783.20-136,174.80-84,878.30

Finding the Fourth Proportional to 90,783.20, 136,174.80 and 84,878.30

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Solution

The fourth proportional to 90,783.20, 136,174.80 and 84,878.30 is: 127,317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.20 : 136,174.80 = 84,878.30 : x
  2. Step 2: Convert to fraction form
    90,783.20/136,174.80 = 84,878.30/x
  3. Step 3: Cross multiply
    90,783.20x = 136,174.80 × 84,878.30
  4. Step 4: Simplify right side
    90,783.20x = 11,558,285,526.84
  5. Step 5: Solve for x
    x = 11,558,285,526.84/90,783.20
  6. Step 6: Final answer
    x = 127,317.45

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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.