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Finding the Fourth Proportional to 90,457.70, 124,702.50 and 64,955.92

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Solution

The fourth proportional to 90,457.70, 124,702.50 and 64,955.92 is: 89,546.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,457.70 : 124,702.50 = 64,955.92 : x
  2. Step 2: Convert to fraction form
    90,457.70/124,702.50 = 64,955.92/x
  3. Step 3: Cross multiply
    90,457.70x = 124,702.50 × 64,955.92
  4. Step 4: Simplify right side
    90,457.70x = 8,100,165,613.80
  5. Step 5: Solve for x
    x = 8,100,165,613.80/90,457.70
  6. Step 6: Final answer
    x = 89,546.45

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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.