Home / 138,687,221.40-208,064,009.70-66,824,539.80

Finding the Fourth Proportional to 138,687,221.40, 208,064,009.70 and 66,824,539.80

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Solution

The fourth proportional to 138,687,221.40, 208,064,009.70 and 66,824,539.80 is: 100,252,795.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,687,221.40 : 208,064,009.70 = 66,824,539.80 : x
  2. Step 2: Convert to fraction form
    138,687,221.40/208,064,009.70 = 66,824,539.80/x
  3. Step 3: Cross multiply
    138,687,221.40x = 208,064,009.70 × 66,824,539.80
  4. Step 4: Simplify right side
    138,687,221.40x = 13,903,781,697,145,234
  5. Step 5: Solve for x
    x = 13,903,781,697,145,234/138,687,221.40
  6. Step 6: Final answer
    x = 100,252,795.87

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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.