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Finding the Fourth Proportional to 315,130.56, 472,623.86 and 90,489.22

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Solution

The fourth proportional to 315,130.56, 472,623.86 and 90,489.22 is: 135,713.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,130.56 : 472,623.86 = 90,489.22 : x
  2. Step 2: Convert to fraction form
    315,130.56/472,623.86 = 90,489.22/x
  3. Step 3: Cross multiply
    315,130.56x = 472,623.86 × 90,489.22
  4. Step 4: Simplify right side
    315,130.56x = 42,767,364,444.79
  5. Step 5: Solve for x
    x = 42,767,364,444.79/315,130.56
  6. Step 6: Final answer
    x = 135,713.16

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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.