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Finding the Fourth Proportional to 143,354.40, 215,128.80 and 93,312.60

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Solution

The fourth proportional to 143,354.40, 215,128.80 and 93,312.60 is: 140,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,354.40 : 215,128.80 = 93,312.60 : x
  2. Step 2: Convert to fraction form
    143,354.40/215,128.80 = 93,312.60/x
  3. Step 3: Cross multiply
    143,354.40x = 215,128.80 × 93,312.60
  4. Step 4: Simplify right side
    143,354.40x = 20,074,227,662.88
  5. Step 5: Solve for x
    x = 20,074,227,662.88/143,354.40
  6. Step 6: Final answer
    x = 140,032.17

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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.