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Finding the Fourth Proportional to 143,503.90, 215,255.88 and 43,655.20

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Solution

The fourth proportional to 143,503.90, 215,255.88 and 43,655.20 is: 65,482.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,503.90 : 215,255.88 = 43,655.20 : x
  2. Step 2: Convert to fraction form
    143,503.90/215,255.88 = 43,655.20/x
  3. Step 3: Cross multiply
    143,503.90x = 215,255.88 × 43,655.20
  4. Step 4: Simplify right side
    143,503.90x = 9,397,038,492.58
  5. Step 5: Solve for x
    x = 9,397,038,492.58/143,503.90
  6. Step 6: Final answer
    x = 65,482.81

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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.