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Finding the Fourth Proportional to 78,579,486.72, 117,868,400.64 and 30,710,016

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Solution

The fourth proportional to 78,579,486.72, 117,868,400.64 and 30,710,016 is: 46,064,699.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579,486.72 : 117,868,400.64 = 30,710,016 : x
  2. Step 2: Convert to fraction form
    78,579,486.72/117,868,400.64 = 30,710,016/x
  3. Step 3: Cross multiply
    78,579,486.72x = 117,868,400.64 × 30,710,016
  4. Step 4: Simplify right side
    78,579,486.72x = 3,619,740,469,548,810.50
  5. Step 5: Solve for x
    x = 3,619,740,469,548,810.50/78,579,486.72
  6. Step 6: Final answer
    x = 46,064,699.84

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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.