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Finding the Fourth Proportional to 127,709,903.60, 191,589,738.60 and 51,019,881.20

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Solution

The fourth proportional to 127,709,903.60, 191,589,738.60 and 51,019,881.20 is: 76,539,762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,709,903.60 : 191,589,738.60 = 51,019,881.20 : x
  2. Step 2: Convert to fraction form
    127,709,903.60/191,589,738.60 = 51,019,881.20/x
  3. Step 3: Cross multiply
    127,709,903.60x = 191,589,738.60 × 51,019,881.20
  4. Step 4: Simplify right side
    127,709,903.60x = 9,774,885,702,511,054
  5. Step 5: Solve for x
    x = 9,774,885,702,511,054/127,709,903.60
  6. Step 6: Final answer
    x = 76,539,762.59

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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.