Home / 78,889,416.37-118,334,122.73-21,381,686.40

Finding the Fourth Proportional to 78,889,416.37, 118,334,122.73 and 21,381,686.40

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Solution

The fourth proportional to 78,889,416.37, 118,334,122.73 and 21,381,686.40 is: 32,072,529.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,889,416.37 : 118,334,122.73 = 21,381,686.40 : x
  2. Step 2: Convert to fraction form
    78,889,416.37/118,334,122.73 = 21,381,686.40/x
  3. Step 3: Cross multiply
    78,889,416.37x = 118,334,122.73 × 21,381,686.40
  4. Step 4: Simplify right side
    78,889,416.37x = 2,530,183,102,631,972
  5. Step 5: Solve for x
    x = 2,530,183,102,631,972/78,889,416.37
  6. Step 6: Final answer
    x = 32,072,529.11

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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.