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Finding the Fourth Proportional to 139,968,362.40, 209,952,543.60 and 105,956,138.40

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Solution

The fourth proportional to 139,968,362.40, 209,952,543.60 and 105,956,138.40 is: 158,934,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,362.40 : 209,952,543.60 = 105,956,138.40 : x
  2. Step 2: Convert to fraction form
    139,968,362.40/209,952,543.60 = 105,956,138.40/x
  3. Step 3: Cross multiply
    139,968,362.40x = 209,952,543.60 × 105,956,138.40
  4. Step 4: Simplify right side
    139,968,362.40x = 22,245,760,767,113,636
  5. Step 5: Solve for x
    x = 22,245,760,767,113,636/139,968,362.40
  6. Step 6: Final answer
    x = 158,934,207.60

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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.