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Finding the Fourth Proportional to 77,866.61, 107,455.94 and 42,056.64

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Solution

The fourth proportional to 77,866.61, 107,455.94 and 42,056.64 is: 58,038.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,866.61 : 107,455.94 = 42,056.64 : x
  2. Step 2: Convert to fraction form
    77,866.61/107,455.94 = 42,056.64/x
  3. Step 3: Cross multiply
    77,866.61x = 107,455.94 × 42,056.64
  4. Step 4: Simplify right side
    77,866.61x = 4,519,235,574.16
  5. Step 5: Solve for x
    x = 4,519,235,574.16/77,866.61
  6. Step 6: Final answer
    x = 58,038.17

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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.