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Finding the Fourth Proportional to 74,378.77, 102,685.62 and 56,442.40

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Solution

The fourth proportional to 74,378.77, 102,685.62 and 56,442.40 is: 77,923.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,378.77 : 102,685.62 = 56,442.40 : x
  2. Step 2: Convert to fraction form
    74,378.77/102,685.62 = 56,442.40/x
  3. Step 3: Cross multiply
    74,378.77x = 102,685.62 × 56,442.40
  4. Step 4: Simplify right side
    74,378.77x = 5,795,822,793.23
  5. Step 5: Solve for x
    x = 5,795,822,793.23/74,378.77
  6. Step 6: Final answer
    x = 77,923.08

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1.5x scale

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.