Home / 75,135.78-103,698.76-42,870.24

Finding the Fourth Proportional to 75,135.78, 103,698.76 and 42,870.24

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Solution

The fourth proportional to 75,135.78, 103,698.76 and 42,870.24 is: 59,167.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,135.78 : 103,698.76 = 42,870.24 : x
  2. Step 2: Convert to fraction form
    75,135.78/103,698.76 = 42,870.24/x
  3. Step 3: Cross multiply
    75,135.78x = 103,698.76 × 42,870.24
  4. Step 4: Simplify right side
    75,135.78x = 4,445,590,728.90
  5. Step 5: Solve for x
    x = 4,445,590,728.90/75,135.78
  6. Step 6: Final answer
    x = 59,167.43

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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.