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Finding the Fourth Proportional to 148,971.80, 223,457.70 and 142,059.80

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Solution

The fourth proportional to 148,971.80, 223,457.70 and 142,059.80 is: 213,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,971.80 : 223,457.70 = 142,059.80 : x
  2. Step 2: Convert to fraction form
    148,971.80/223,457.70 = 142,059.80/x
  3. Step 3: Cross multiply
    148,971.80x = 223,457.70 × 142,059.80
  4. Step 4: Simplify right side
    148,971.80x = 31,744,356,170.46
  5. Step 5: Solve for x
    x = 31,744,356,170.46/148,971.80
  6. Step 6: Final answer
    x = 213,089.70

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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.