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Finding the Fourth Proportional to 143,070.60, 214,703.10 and 79,890.60

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Solution

The fourth proportional to 143,070.60, 214,703.10 and 79,890.60 is: 119,890.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,070.60 : 214,703.10 = 79,890.60 : x
  2. Step 2: Convert to fraction form
    143,070.60/214,703.10 = 79,890.60/x
  3. Step 3: Cross multiply
    143,070.60x = 214,703.10 × 79,890.60
  4. Step 4: Simplify right side
    143,070.60x = 17,152,759,480.86
  5. Step 5: Solve for x
    x = 17,152,759,480.86/143,070.60
  6. Step 6: Final answer
    x = 119,890.18

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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.