Home / 78,199.20-107,915.04-42,389.10

Finding the Fourth Proportional to 78,199.20, 107,915.04 and 42,389.10

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Solution

The fourth proportional to 78,199.20, 107,915.04 and 42,389.10 is: 58,497.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,199.20 : 107,915.04 = 42,389.10 : x
  2. Step 2: Convert to fraction form
    78,199.20/107,915.04 = 42,389.10/x
  3. Step 3: Cross multiply
    78,199.20x = 107,915.04 × 42,389.10
  4. Step 4: Simplify right side
    78,199.20x = 4,574,421,422.06
  5. Step 5: Solve for x
    x = 4,574,421,422.06/78,199.20
  6. Step 6: Final answer
    x = 58,497.04

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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.