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Finding the Fourth Proportional to 72,407,830.40, 108,611,745.60 and 26,960,220.80

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Solution

The fourth proportional to 72,407,830.40, 108,611,745.60 and 26,960,220.80 is: 40,440,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,407,830.40 : 108,611,745.60 = 26,960,220.80 : x
  2. Step 2: Convert to fraction form
    72,407,830.40/108,611,745.60 = 26,960,220.80/x
  3. Step 3: Cross multiply
    72,407,830.40x = 108,611,745.60 × 26,960,220.80
  4. Step 4: Simplify right side
    72,407,830.40x = 2,928,196,642,849,428.50
  5. Step 5: Solve for x
    x = 2,928,196,642,849,428.50/72,407,830.40
  6. Step 6: Final answer
    x = 40,440,331.20

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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.