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Finding the Fourth Proportional to 72,612,436.80, 101,912,503.20 and 72,612,436.80

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Solution

The fourth proportional to 72,612,436.80, 101,912,503.20 and 72,612,436.80 is: 101,912,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612,436.80 : 101,912,503.20 = 72,612,436.80 : x
  2. Step 2: Convert to fraction form
    72,612,436.80/101,912,503.20 = 72,612,436.80/x
  3. Step 3: Cross multiply
    72,612,436.80x = 101,912,503.20 × 72,612,436.80
  4. Step 4: Simplify right side
    72,612,436.80x = 7,400,115,197,739,798
  5. Step 5: Solve for x
    x = 7,400,115,197,739,798/72,612,436.80
  6. Step 6: Final answer
    x = 101,912,503.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.