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Finding the Fourth Proportional to 121,788,709.80, 182,683,064.70 and 98,830,458.60

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Solution

The fourth proportional to 121,788,709.80, 182,683,064.70 and 98,830,458.60 is: 148,245,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,788,709.80 : 182,683,064.70 = 98,830,458.60 : x
  2. Step 2: Convert to fraction form
    121,788,709.80/182,683,064.70 = 98,830,458.60/x
  3. Step 3: Cross multiply
    121,788,709.80x = 182,683,064.70 × 98,830,458.60
  4. Step 4: Simplify right side
    121,788,709.80x = 18,054,651,062,754,468
  5. Step 5: Solve for x
    x = 18,054,651,062,754,468/121,788,709.80
  6. Step 6: Final answer
    x = 148,245,687.90

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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.