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Finding the Fourth Proportional to 65,478.38, 90,360.16 and 35,670.38

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Solution

The fourth proportional to 65,478.38, 90,360.16 and 35,670.38 is: 49,225.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,478.38 : 90,360.16 = 35,670.38 : x
  2. Step 2: Convert to fraction form
    65,478.38/90,360.16 = 35,670.38/x
  3. Step 3: Cross multiply
    65,478.38x = 90,360.16 × 35,670.38
  4. Step 4: Simplify right side
    65,478.38x = 3,223,180,703.08
  5. Step 5: Solve for x
    x = 3,223,180,703.08/65,478.38
  6. Step 6: Final answer
    x = 49,225.12

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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.