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Finding the Fourth Proportional to 143,573,978.60, 215,360,967.90 and 52,685,757.80

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Solution

The fourth proportional to 143,573,978.60, 215,360,967.90 and 52,685,757.80 is: 79,028,636.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,573,978.60 : 215,360,967.90 = 52,685,757.80 : x
  2. Step 2: Convert to fraction form
    143,573,978.60/215,360,967.90 = 52,685,757.80/x
  3. Step 3: Cross multiply
    143,573,978.60x = 215,360,967.90 × 52,685,757.80
  4. Step 4: Simplify right side
    143,573,978.60x = 11,346,455,794,352,974
  5. Step 5: Solve for x
    x = 11,346,455,794,352,974/143,573,978.60
  6. Step 6: Final answer
    x = 79,028,636.70

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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.