Home / 258,258,643.56-387,388,380.87-78,578,944.47

Finding the Fourth Proportional to 258,258,643.56, 387,388,380.87 and 78,578,944.47

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Solution

The fourth proportional to 258,258,643.56, 387,388,380.87 and 78,578,944.47 is: 117,868,543.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,258,643.56 : 387,388,380.87 = 78,578,944.47 : x
  2. Step 2: Convert to fraction form
    258,258,643.56/387,388,380.87 = 78,578,944.47/x
  3. Step 3: Cross multiply
    258,258,643.56x = 387,388,380.87 × 78,578,944.47
  4. Step 4: Simplify right side
    258,258,643.56x = 30,440,570,068,706,940
  5. Step 5: Solve for x
    x = 30,440,570,068,706,940/258,258,643.56
  6. Step 6: Final answer
    x = 117,868,543.14

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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.