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Finding the Fourth Proportional to 72,613,971.20, 108,771,657.60 and 49,920,492.80

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Solution

The fourth proportional to 72,613,971.20, 108,771,657.60 and 49,920,492.80 is: 74,778,099.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,613,971.20 : 108,771,657.60 = 49,920,492.80 : x
  2. Step 2: Convert to fraction form
    72,613,971.20/108,771,657.60 = 49,920,492.80/x
  3. Step 3: Cross multiply
    72,613,971.20x = 108,771,657.60 × 49,920,492.80
  4. Step 4: Simplify right side
    72,613,971.20x = 5,429,934,750,064,865
  5. Step 5: Solve for x
    x = 5,429,934,750,064,865/72,613,971.20
  6. Step 6: Final answer
    x = 74,778,099.32

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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.