Home / 78,889,420.18-118,334,128.44-21,381,690.20

Finding the Fourth Proportional to 78,889,420.18, 118,334,128.44 and 21,381,690.20

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Solution

The fourth proportional to 78,889,420.18, 118,334,128.44 and 21,381,690.20 is: 32,072,534.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,889,420.18 : 118,334,128.44 = 21,381,690.20 : x
  2. Step 2: Convert to fraction form
    78,889,420.18/118,334,128.44 = 21,381,690.20/x
  3. Step 3: Cross multiply
    78,889,420.18x = 118,334,128.44 × 21,381,690.20
  4. Step 4: Simplify right side
    78,889,420.18x = 2,530,183,674,391,089
  5. Step 5: Solve for x
    x = 2,530,183,674,391,089/78,889,420.18
  6. Step 6: Final answer
    x = 32,072,534.80

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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.