Home / 145,967,771.72-201,436,058.64-78,986,730.20

Finding the Fourth Proportional to 145,967,771.72, 201,436,058.64 and 78,986,730.20

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Solution

The fourth proportional to 145,967,771.72, 201,436,058.64 and 78,986,730.20 is: 109,001,976.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,967,771.72 : 201,436,058.64 = 78,986,730.20 : x
  2. Step 2: Convert to fraction form
    145,967,771.72/201,436,058.64 = 78,986,730.20/x
  3. Step 3: Cross multiply
    145,967,771.72x = 201,436,058.64 × 78,986,730.20
  4. Step 4: Simplify right side
    145,967,771.72x = 15,910,775,616,349,058
  5. Step 5: Solve for x
    x = 15,910,775,616,349,058/145,967,771.72
  6. Step 6: Final answer
    x = 109,001,976.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.