Home / 100,692,058.72-138,869,191.88-85,087,285.60

Finding the Fourth Proportional to 100,692,058.72, 138,869,191.88 and 85,087,285.60

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Solution

The fourth proportional to 100,692,058.72, 138,869,191.88 and 85,087,285.60 is: 117,347,909.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,692,058.72 : 138,869,191.88 = 85,087,285.60 : x
  2. Step 2: Convert to fraction form
    100,692,058.72/138,869,191.88 = 85,087,285.60/x
  3. Step 3: Cross multiply
    100,692,058.72x = 138,869,191.88 × 85,087,285.60
  4. Step 4: Simplify right side
    100,692,058.72x = 11,816,002,590,534,760
  5. Step 5: Solve for x
    x = 11,816,002,590,534,760/100,692,058.72
  6. Step 6: Final answer
    x = 117,347,909.47

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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.