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Finding the Fourth Proportional to 65,721.40, 90,695.58 and 35,506.71

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Solution

The fourth proportional to 65,721.40, 90,695.58 and 35,506.71 is: 48,999.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.40 : 90,695.58 = 35,506.71 : x
  2. Step 2: Convert to fraction form
    65,721.40/90,695.58 = 35,506.71/x
  3. Step 3: Cross multiply
    65,721.40x = 90,695.58 × 35,506.71
  4. Step 4: Simplify right side
    65,721.40x = 3,220,301,184.08
  5. Step 5: Solve for x
    x = 3,220,301,184.08/65,721.40
  6. Step 6: Final answer
    x = 48,999.28

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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.