Home / 78,724,681.05-118,086,601.09-20,432,316.48

Finding the Fourth Proportional to 78,724,681.05, 118,086,601.09 and 20,432,316.48

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Solution

The fourth proportional to 78,724,681.05, 118,086,601.09 and 20,432,316.48 is: 30,648,365.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724,681.05 : 118,086,601.09 = 20,432,316.48 : x
  2. Step 2: Convert to fraction form
    78,724,681.05/118,086,601.09 = 20,432,316.48/x
  3. Step 3: Cross multiply
    78,724,681.05x = 118,086,601.09 × 20,432,316.48
  4. Step 4: Simplify right side
    78,724,681.05x = 2,412,782,805,518,393
  5. Step 5: Solve for x
    x = 2,412,782,805,518,393/78,724,681.05
  6. Step 6: Final answer
    x = 30,648,365.59

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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.