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Finding the Fourth Proportional to 90,328.38, 134,943.12 and 58,478.97

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Solution

The fourth proportional to 90,328.38, 134,943.12 and 58,478.97 is: 87,362.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,328.38 : 134,943.12 = 58,478.97 : x
  2. Step 2: Convert to fraction form
    90,328.38/134,943.12 = 58,478.97/x
  3. Step 3: Cross multiply
    90,328.38x = 134,943.12 × 58,478.97
  4. Step 4: Simplify right side
    90,328.38x = 7,891,334,666.19
  5. Step 5: Solve for x
    x = 7,891,334,666.19/90,328.38
  6. Step 6: Final answer
    x = 87,362.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.