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Finding the Fourth Proportional to 70,655,998.40, 105,983,997.60 and 70,208,100.80

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Solution

The fourth proportional to 70,655,998.40, 105,983,997.60 and 70,208,100.80 is: 105,312,151.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,655,998.40 : 105,983,997.60 = 70,208,100.80 : x
  2. Step 2: Convert to fraction form
    70,655,998.40/105,983,997.60 = 70,208,100.80/x
  3. Step 3: Cross multiply
    70,655,998.40x = 105,983,997.60 × 70,208,100.80
  4. Step 4: Simplify right side
    70,655,998.40x = 7,440,935,186,687,757
  5. Step 5: Solve for x
    x = 7,440,935,186,687,757/70,655,998.40
  6. Step 6: Final answer
    x = 105,312,151.20

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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.