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Finding the Fourth Proportional to 74,754.95, 112,117.13 and 21,432.64

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Solution

The fourth proportional to 74,754.95, 112,117.13 and 21,432.64 is: 32,144.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,754.95 : 112,117.13 = 21,432.64 : x
  2. Step 2: Convert to fraction form
    74,754.95/112,117.13 = 21,432.64/x
  3. Step 3: Cross multiply
    74,754.95x = 112,117.13 × 21,432.64
  4. Step 4: Simplify right side
    74,754.95x = 2,402,966,085.12
  5. Step 5: Solve for x
    x = 2,402,966,085.12/74,754.95
  6. Step 6: Final answer
    x = 32,144.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.