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Finding the Fourth Proportional to 72,806,404.80, 109,209,607.20 and 61,327,279.20

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Solution

The fourth proportional to 72,806,404.80, 109,209,607.20 and 61,327,279.20 is: 91,990,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,806,404.80 : 109,209,607.20 = 61,327,279.20 : x
  2. Step 2: Convert to fraction form
    72,806,404.80/109,209,607.20 = 61,327,279.20/x
  3. Step 3: Cross multiply
    72,806,404.80x = 109,209,607.20 × 61,327,279.20
  4. Step 4: Simplify right side
    72,806,404.80x = 6,697,528,072,076,731
  5. Step 5: Solve for x
    x = 6,697,528,072,076,731/72,806,404.80
  6. Step 6: Final answer
    x = 91,990,918.80

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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.