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Finding the Fourth Proportional to 68,437,122, 94,419,978.12 and 39,047,341.20

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Solution

The fourth proportional to 68,437,122, 94,419,978.12 and 39,047,341.20 is: 53,872,065.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,437,122 : 94,419,978.12 = 39,047,341.20 : x
  2. Step 2: Convert to fraction form
    68,437,122/94,419,978.12 = 39,047,341.20/x
  3. Step 3: Cross multiply
    68,437,122x = 94,419,978.12 × 39,047,341.20
  4. Step 4: Simplify right side
    68,437,122x = 3,686,849,101,748,175
  5. Step 5: Solve for x
    x = 3,686,849,101,748,175/68,437,122
  6. Step 6: Final answer
    x = 53,872,065.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.