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Finding the Fourth Proportional to 123,574.61, 170,533.23 and 66,985.98

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Solution

The fourth proportional to 123,574.61, 170,533.23 and 66,985.98 is: 92,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,574.61 : 170,533.23 = 66,985.98 : x
  2. Step 2: Convert to fraction form
    123,574.61/170,533.23 = 66,985.98/x
  3. Step 3: Cross multiply
    123,574.61x = 170,533.23 × 66,985.98
  4. Step 4: Simplify right side
    123,574.61x = 11,423,335,534.12
  5. Step 5: Solve for x
    x = 11,423,335,534.12/123,574.61
  6. Step 6: Final answer
    x = 92,440.80

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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.