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Finding the Fourth Proportional to 90,638.16, 135,971.04 and 46,240.68

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Solution

The fourth proportional to 90,638.16, 135,971.04 and 46,240.68 is: 69,368.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,638.16 : 135,971.04 = 46,240.68 : x
  2. Step 2: Convert to fraction form
    90,638.16/135,971.04 = 46,240.68/x
  3. Step 3: Cross multiply
    90,638.16x = 135,971.04 × 46,240.68
  4. Step 4: Simplify right side
    90,638.16x = 6,287,393,349.91
  5. Step 5: Solve for x
    x = 6,287,393,349.91/90,638.16
  6. Step 6: Final answer
    x = 69,368.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.