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Finding the Fourth Proportional to 90,060.61, 135,090.73 and 84,580.12

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Solution

The fourth proportional to 90,060.61, 135,090.73 and 84,580.12 is: 126,870.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,060.61 : 135,090.73 = 84,580.12 : x
  2. Step 2: Convert to fraction form
    90,060.61/135,090.73 = 84,580.12/x
  3. Step 3: Cross multiply
    90,060.61x = 135,090.73 × 84,580.12
  4. Step 4: Simplify right side
    90,060.61x = 11,425,990,492.01
  5. Step 5: Solve for x
    x = 11,425,990,492.01/90,060.61
  6. Step 6: Final answer
    x = 126,870.01

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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.