Home / 138,608,021.55-207,841,970.53-81,117,565.23

Finding the Fourth Proportional to 138,608,021.55, 207,841,970.53 and 81,117,565.23

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Solution

The fourth proportional to 138,608,021.55, 207,841,970.53 and 81,117,565.23 is: 121,635,345.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608,021.55 : 207,841,970.53 = 81,117,565.23 : x
  2. Step 2: Convert to fraction form
    138,608,021.55/207,841,970.53 = 81,117,565.23/x
  3. Step 3: Cross multiply
    138,608,021.55x = 207,841,970.53 × 81,117,565.23
  4. Step 4: Simplify right side
    138,608,021.55x = 16,859,634,601,999,014
  5. Step 5: Solve for x
    x = 16,859,634,601,999,014/138,608,021.55
  6. Step 6: Final answer
    x = 121,635,345.58

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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.