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Finding the Fourth Proportional to 74,271.50, 102,492.74 and 42,440.40

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Solution

The fourth proportional to 74,271.50, 102,492.74 and 42,440.40 is: 58,566.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,271.50 : 102,492.74 = 42,440.40 : x
  2. Step 2: Convert to fraction form
    74,271.50/102,492.74 = 42,440.40/x
  3. Step 3: Cross multiply
    74,271.50x = 102,492.74 × 42,440.40
  4. Step 4: Simplify right side
    74,271.50x = 4,349,832,988.80
  5. Step 5: Solve for x
    x = 4,349,832,988.80/74,271.50
  6. Step 6: Final answer
    x = 58,566.65

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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.