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Finding the Fourth Proportional to 138,993,602.40, 208,490,403.60 and 35,362,607.40

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Solution

The fourth proportional to 138,993,602.40, 208,490,403.60 and 35,362,607.40 is: 53,043,911.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,993,602.40 : 208,490,403.60 = 35,362,607.40 : x
  2. Step 2: Convert to fraction form
    138,993,602.40/208,490,403.60 = 35,362,607.40/x
  3. Step 3: Cross multiply
    138,993,602.40x = 208,490,403.60 × 35,362,607.40
  4. Step 4: Simplify right side
    138,993,602.40x = 7,372,764,289,174,346
  5. Step 5: Solve for x
    x = 7,372,764,289,174,346/138,993,602.40
  6. Step 6: Final answer
    x = 53,043,911.10

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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.