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Finding the Fourth Proportional to 139,408,030.40, 208,713,914.40 and 135,426,718.40

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Solution

The fourth proportional to 139,408,030.40, 208,713,914.40 and 135,426,718.40 is: 202,753,316.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408,030.40 : 208,713,914.40 = 135,426,718.40 : x
  2. Step 2: Convert to fraction form
    139,408,030.40/208,713,914.40 = 135,426,718.40/x
  3. Step 3: Cross multiply
    139,408,030.40x = 208,713,914.40 × 135,426,718.40
  4. Step 4: Simplify right side
    139,408,030.40x = 28,265,440,511,610,508
  5. Step 5: Solve for x
    x = 28,265,440,511,610,508/139,408,030.40
  6. Step 6: Final answer
    x = 202,753,316.51

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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.