Home / 77,128,981.51-115,694,150.24-19,621,313.50

Finding the Fourth Proportional to 77,128,981.51, 115,694,150.24 and 19,621,313.50

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Solution

The fourth proportional to 77,128,981.51, 115,694,150.24 and 19,621,313.50 is: 29,432,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,128,981.51 : 115,694,150.24 = 19,621,313.50 : x
  2. Step 2: Convert to fraction form
    77,128,981.51/115,694,150.24 = 19,621,313.50/x
  3. Step 3: Cross multiply
    77,128,981.51x = 115,694,150.24 × 19,621,313.50
  4. Step 4: Simplify right side
    77,128,981.51x = 2,270,071,191,975,140
  5. Step 5: Solve for x
    x = 2,270,071,191,975,140/77,128,981.51
  6. Step 6: Final answer
    x = 29,432,142.72

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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.