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Finding the Fourth Proportional to 90,707.81, 125,186.96 and 50,425.40

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Solution

The fourth proportional to 90,707.81, 125,186.96 and 50,425.40 is: 69,592.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,707.81 : 125,186.96 = 50,425.40 : x
  2. Step 2: Convert to fraction form
    90,707.81/125,186.96 = 50,425.40/x
  3. Step 3: Cross multiply
    90,707.81x = 125,186.96 × 50,425.40
  4. Step 4: Simplify right side
    90,707.81x = 6,312,602,971.81
  5. Step 5: Solve for x
    x = 6,312,602,971.81/90,707.81
  6. Step 6: Final answer
    x = 69,592.72

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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.