Home / 74,981.60-103,488-57,049.28

Finding the Fourth Proportional to 74,981.60, 103,488 and 57,049.28

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Solution

The fourth proportional to 74,981.60, 103,488 and 57,049.28 is: 78,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,981.60 : 103,488 = 57,049.28 : x
  2. Step 2: Convert to fraction form
    74,981.60/103,488 = 57,049.28/x
  3. Step 3: Cross multiply
    74,981.60x = 103,488 × 57,049.28
  4. Step 4: Simplify right side
    74,981.60x = 5,903,915,888.64
  5. Step 5: Solve for x
    x = 5,903,915,888.64/74,981.60
  6. Step 6: Final answer
    x = 78,738.20

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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.