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Finding the Fourth Proportional to 65,476.63, 90,353.49 and 38,612.98

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Solution

The fourth proportional to 65,476.63, 90,353.49 and 38,612.98 is: 53,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,476.63 : 90,353.49 = 38,612.98 : x
  2. Step 2: Convert to fraction form
    65,476.63/90,353.49 = 38,612.98/x
  3. Step 3: Cross multiply
    65,476.63x = 90,353.49 × 38,612.98
  4. Step 4: Simplify right side
    65,476.63x = 3,488,817,050.53
  5. Step 5: Solve for x
    x = 3,488,817,050.53/65,476.63
  6. Step 6: Final answer
    x = 53,283.40

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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.