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Finding the Fourth Proportional to 72,808,822.40, 109,213,233.60 and 65,502,492.80

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Solution

The fourth proportional to 72,808,822.40, 109,213,233.60 and 65,502,492.80 is: 98,253,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,808,822.40 : 109,213,233.60 = 65,502,492.80 : x
  2. Step 2: Convert to fraction form
    72,808,822.40/109,213,233.60 = 65,502,492.80/x
  3. Step 3: Cross multiply
    72,808,822.40x = 109,213,233.60 × 65,502,492.80
  4. Step 4: Simplify right side
    72,808,822.40x = 7,153,739,047,548,717
  5. Step 5: Solve for x
    x = 7,153,739,047,548,717/72,808,822.40
  6. Step 6: Final answer
    x = 98,253,739.20

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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.