Home / 105,147.11-145,102.95-57,400.45

Finding the Fourth Proportional to 105,147.11, 145,102.95 and 57,400.45

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Solution

The fourth proportional to 105,147.11, 145,102.95 and 57,400.45 is: 79,212.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,147.11 : 145,102.95 = 57,400.45 : x
  2. Step 2: Convert to fraction form
    105,147.11/145,102.95 = 57,400.45/x
  3. Step 3: Cross multiply
    105,147.11x = 145,102.95 × 57,400.45
  4. Step 4: Simplify right side
    105,147.11x = 8,328,974,263.57
  5. Step 5: Solve for x
    x = 8,328,974,263.57/105,147.11
  6. Step 6: Final answer
    x = 79,212.58

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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.