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Finding the Fourth Proportional to 77,325,978.88, 106,713,681.53 and 47,966,770.97

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Solution

The fourth proportional to 77,325,978.88, 106,713,681.53 and 47,966,770.97 is: 66,196,520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,325,978.88 : 106,713,681.53 = 47,966,770.97 : x
  2. Step 2: Convert to fraction form
    77,325,978.88/106,713,681.53 = 47,966,770.97/x
  3. Step 3: Cross multiply
    77,325,978.88x = 106,713,681.53 × 47,966,770.97
  4. Step 4: Simplify right side
    77,325,978.88x = 5,118,710,720,941,804
  5. Step 5: Solve for x
    x = 5,118,710,720,941,804/77,325,978.88
  6. Step 6: Final answer
    x = 66,196,520.17

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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.