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Finding the Fourth Proportional to 139,968,501.30, 209,952,751.95 and 127,203,419.70

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Solution

The fourth proportional to 139,968,501.30, 209,952,751.95 and 127,203,419.70 is: 190,805,129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,501.30 : 209,952,751.95 = 127,203,419.70 : x
  2. Step 2: Convert to fraction form
    139,968,501.30/209,952,751.95 = 127,203,419.70/x
  3. Step 3: Cross multiply
    139,968,501.30x = 209,952,751.95 × 127,203,419.70
  4. Step 4: Simplify right side
    139,968,501.30x = 26,706,708,023,465,844
  5. Step 5: Solve for x
    x = 26,706,708,023,465,844/139,968,501.30
  6. Step 6: Final answer
    x = 190,805,129.55

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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.