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Finding the Fourth Proportional to 65,781,611.60, 98,672,417.40 and 45,374,277.20

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Solution

The fourth proportional to 65,781,611.60, 98,672,417.40 and 45,374,277.20 is: 68,061,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781,611.60 : 98,672,417.40 = 45,374,277.20 : x
  2. Step 2: Convert to fraction form
    65,781,611.60/98,672,417.40 = 45,374,277.20/x
  3. Step 3: Cross multiply
    65,781,611.60x = 98,672,417.40 × 45,374,277.20
  4. Step 4: Simplify right side
    65,781,611.60x = 4,477,189,619,101,704
  5. Step 5: Solve for x
    x = 4,477,189,619,101,704/65,781,611.60
  6. Step 6: Final answer
    x = 68,061,415.80

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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.