Home / 78,889,418.37-118,334,125.73-21,381,688.40

Finding the Fourth Proportional to 78,889,418.37, 118,334,125.73 and 21,381,688.40

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Solution

The fourth proportional to 78,889,418.37, 118,334,125.73 and 21,381,688.40 is: 32,072,532.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,889,418.37 : 118,334,125.73 = 21,381,688.40 : x
  2. Step 2: Convert to fraction form
    78,889,418.37/118,334,125.73 = 21,381,688.40/x
  3. Step 3: Cross multiply
    78,889,418.37x = 118,334,125.73 × 21,381,688.40
  4. Step 4: Simplify right side
    78,889,418.37x = 2,530,183,403,445,282.50
  5. Step 5: Solve for x
    x = 2,530,183,403,445,282.50/78,889,418.37
  6. Step 6: Final answer
    x = 32,072,532.11

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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.