Home / 90,915.13-136,378.16-28,585.63

Finding the Fourth Proportional to 90,915.13, 136,378.16 and 28,585.63

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Solution

The fourth proportional to 90,915.13, 136,378.16 and 28,585.63 is: 42,880.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,915.13 : 136,378.16 = 28,585.63 : x
  2. Step 2: Convert to fraction form
    90,915.13/136,378.16 = 28,585.63/x
  3. Step 3: Cross multiply
    90,915.13x = 136,378.16 × 28,585.63
  4. Step 4: Simplify right side
    90,915.13x = 3,898,454,797.02
  5. Step 5: Solve for x
    x = 3,898,454,797.02/90,915.13
  6. Step 6: Final answer
    x = 42,880.16

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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.