Home / 86,470.02-128,845.44-77,037.57

Finding the Fourth Proportional to 86,470.02, 128,845.44 and 77,037.57

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Solution

The fourth proportional to 86,470.02, 128,845.44 and 77,037.57 is: 114,790.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,470.02 : 128,845.44 = 77,037.57 : x
  2. Step 2: Convert to fraction form
    86,470.02/128,845.44 = 77,037.57/x
  3. Step 3: Cross multiply
    86,470.02x = 128,845.44 × 77,037.57
  4. Step 4: Simplify right side
    86,470.02x = 9,925,939,603.18
  5. Step 5: Solve for x
    x = 9,925,939,603.18/86,470.02
  6. Step 6: Final answer
    x = 114,790.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.