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Finding the Fourth Proportional to 121,143,715.80, 181,715,573.70 and 56,426,011.80

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Solution

The fourth proportional to 121,143,715.80, 181,715,573.70 and 56,426,011.80 is: 84,639,017.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,143,715.80 : 181,715,573.70 = 56,426,011.80 : x
  2. Step 2: Convert to fraction form
    121,143,715.80/181,715,573.70 = 56,426,011.80/x
  3. Step 3: Cross multiply
    121,143,715.80x = 181,715,573.70 × 56,426,011.80
  4. Step 4: Simplify right side
    121,143,715.80x = 10,253,485,105,839,968
  5. Step 5: Solve for x
    x = 10,253,485,105,839,968/121,143,715.80
  6. Step 6: Final answer
    x = 84,639,017.70

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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.