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Finding the Fourth Proportional to 77,521.60, 106,978.44 and 43,530.35

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Solution

The fourth proportional to 77,521.60, 106,978.44 and 43,530.35 is: 60,071.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,521.60 : 106,978.44 = 43,530.35 : x
  2. Step 2: Convert to fraction form
    77,521.60/106,978.44 = 43,530.35/x
  3. Step 3: Cross multiply
    77,521.60x = 106,978.44 × 43,530.35
  4. Step 4: Simplify right side
    77,521.60x = 4,656,808,935.65
  5. Step 5: Solve for x
    x = 4,656,808,935.65/77,521.60
  6. Step 6: Final answer
    x = 60,071.11

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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.