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Finding the Fourth Proportional to 70,368,908.80, 105,632,006.40 and 65,748,620.80

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Solution

The fourth proportional to 70,368,908.80, 105,632,006.40 and 65,748,620.80 is: 98,696,410.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,368,908.80 : 105,632,006.40 = 65,748,620.80 : x
  2. Step 2: Convert to fraction form
    70,368,908.80/105,632,006.40 = 65,748,620.80/x
  3. Step 3: Cross multiply
    70,368,908.80x = 105,632,006.40 × 65,748,620.80
  4. Step 4: Simplify right side
    70,368,908.80x = 6,945,158,733,136,773
  5. Step 5: Solve for x
    x = 6,945,158,733,136,773/70,368,908.80
  6. Step 6: Final answer
    x = 98,696,410.84

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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.