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Finding the Fourth Proportional to 99,648,999.60, 149,473,499.40 and 91,039,655.40

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Solution

The fourth proportional to 99,648,999.60, 149,473,499.40 and 91,039,655.40 is: 136,559,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,648,999.60 : 149,473,499.40 = 91,039,655.40 : x
  2. Step 2: Convert to fraction form
    99,648,999.60/149,473,499.40 = 91,039,655.40/x
  3. Step 3: Cross multiply
    99,648,999.60x = 149,473,499.40 × 91,039,655.40
  4. Step 4: Simplify right side
    99,648,999.60x = 13,608,015,876,808,108
  5. Step 5: Solve for x
    x = 13,608,015,876,808,108/99,648,999.60
  6. Step 6: Final answer
    x = 136,559,483.10

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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.