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Finding the Fourth Proportional to 40,479,978.76, 60,719,920.93 and 13,186,227.47

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Solution

The fourth proportional to 40,479,978.76, 60,719,920.93 and 13,186,227.47 is: 19,779,325.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,479,978.76 : 60,719,920.93 = 13,186,227.47 : x
  2. Step 2: Convert to fraction form
    40,479,978.76/60,719,920.93 = 13,186,227.47/x
  3. Step 3: Cross multiply
    40,479,978.76x = 60,719,920.93 × 13,186,227.47
  4. Step 4: Simplify right side
    40,479,978.76x = 800,666,689,056,277.12
  5. Step 5: Solve for x
    x = 800,666,689,056,277.12/40,479,978.76
  6. Step 6: Final answer
    x = 19,779,325.82

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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.