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Finding the Fourth Proportional to 139,968,019.70, 209,952,029.55 and 127,426,886.90

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Solution

The fourth proportional to 139,968,019.70, 209,952,029.55 and 127,426,886.90 is: 191,140,330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,019.70 : 209,952,029.55 = 127,426,886.90 : x
  2. Step 2: Convert to fraction form
    139,968,019.70/209,952,029.55 = 127,426,886.90/x
  3. Step 3: Cross multiply
    139,968,019.70x = 209,952,029.55 × 127,426,886.90
  4. Step 4: Simplify right side
    139,968,019.70x = 26,753,533,523,893,312
  5. Step 5: Solve for x
    x = 26,753,533,523,893,312/139,968,019.70
  6. Step 6: Final answer
    x = 191,140,330.35

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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.