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Finding the Fourth Proportional to 315,066.16, 472,457.06 and 90,375.60

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Solution

The fourth proportional to 315,066.16, 472,457.06 and 90,375.60 is: 135,522.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,066.16 : 472,457.06 = 90,375.60 : x
  2. Step 2: Convert to fraction form
    315,066.16/472,457.06 = 90,375.60/x
  3. Step 3: Cross multiply
    315,066.16x = 472,457.06 × 90,375.60
  4. Step 4: Simplify right side
    315,066.16x = 42,698,590,271.74
  5. Step 5: Solve for x
    x = 42,698,590,271.74/315,066.16
  6. Step 6: Final answer
    x = 135,522.62

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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.