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Finding the Fourth Proportional to 74,173.52, 102,368.04 and 42,347

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Solution

The fourth proportional to 74,173.52, 102,368.04 and 42,347 is: 58,443.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,173.52 : 102,368.04 = 42,347 : x
  2. Step 2: Convert to fraction form
    74,173.52/102,368.04 = 42,347/x
  3. Step 3: Cross multiply
    74,173.52x = 102,368.04 × 42,347
  4. Step 4: Simplify right side
    74,173.52x = 4,334,979,389.88
  5. Step 5: Solve for x
    x = 4,334,979,389.88/74,173.52
  6. Step 6: Final answer
    x = 58,443.76

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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.