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Finding the Fourth Proportional to 139,968,402.30, 209,952,603.45 and 109,357,400.70

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Solution

The fourth proportional to 139,968,402.30, 209,952,603.45 and 109,357,400.70 is: 164,036,101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,402.30 : 209,952,603.45 = 109,357,400.70 : x
  2. Step 2: Convert to fraction form
    139,968,402.30/209,952,603.45 = 109,357,400.70/x
  3. Step 3: Cross multiply
    139,968,402.30x = 209,952,603.45 × 109,357,400.70
  4. Step 4: Simplify right side
    139,968,402.30x = 22,959,870,983,489,852
  5. Step 5: Solve for x
    x = 22,959,870,983,489,852/139,968,402.30
  6. Step 6: Final answer
    x = 164,036,101.05

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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.