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Finding the Fourth Proportional to 77,578.95, 107,046 and 45,754.16

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Solution

The fourth proportional to 77,578.95, 107,046 and 45,754.16 is: 63,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,578.95 : 107,046 = 45,754.16 : x
  2. Step 2: Convert to fraction form
    77,578.95/107,046 = 45,754.16/x
  3. Step 3: Cross multiply
    77,578.95x = 107,046 × 45,754.16
  4. Step 4: Simplify right side
    77,578.95x = 4,897,799,276.13
  5. Step 5: Solve for x
    x = 4,897,799,276.13/77,578.95
  6. Step 6: Final answer
    x = 63,133.10

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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.