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Finding the Fourth Proportional to 74,422.55, 102,702.70 and 40,430.76

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Solution

The fourth proportional to 74,422.55, 102,702.70 and 40,430.76 is: 55,794.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,422.55 : 102,702.70 = 40,430.76 : x
  2. Step 2: Convert to fraction form
    74,422.55/102,702.70 = 40,430.76/x
  3. Step 3: Cross multiply
    74,422.55x = 102,702.70 × 40,430.76
  4. Step 4: Simplify right side
    74,422.55x = 4,152,348,215.05
  5. Step 5: Solve for x
    x = 4,152,348,215.05/74,422.55
  6. Step 6: Final answer
    x = 55,794.22

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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.