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Finding the Fourth Proportional to 65,118.90, 89,881.80 and 38,270.06

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Solution

The fourth proportional to 65,118.90, 89,881.80 and 38,270.06 is: 52,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,118.90 : 89,881.80 = 38,270.06 : x
  2. Step 2: Convert to fraction form
    65,118.90/89,881.80 = 38,270.06/x
  3. Step 3: Cross multiply
    65,118.90x = 89,881.80 × 38,270.06
  4. Step 4: Simplify right side
    65,118.90x = 3,439,781,878.91
  5. Step 5: Solve for x
    x = 3,439,781,878.91/65,118.90
  6. Step 6: Final answer
    x = 52,823.10

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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.