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Finding the Fourth Proportional to 99,939,611.20, 149,909,416.80 and 48,854,401.60

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Solution

The fourth proportional to 99,939,611.20, 149,909,416.80 and 48,854,401.60 is: 73,281,602.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,939,611.20 : 149,909,416.80 = 48,854,401.60 : x
  2. Step 2: Convert to fraction form
    99,939,611.20/149,909,416.80 = 48,854,401.60/x
  3. Step 3: Cross multiply
    99,939,611.20x = 149,909,416.80 × 48,854,401.60
  4. Step 4: Simplify right side
    99,939,611.20x = 7,323,734,851,968,988
  5. Step 5: Solve for x
    x = 7,323,734,851,968,988/99,939,611.20
  6. Step 6: Final answer
    x = 73,281,602.40

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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.