Home / 105,646.15-145,790.85-57,899.38

Finding the Fourth Proportional to 105,646.15, 145,790.85 and 57,899.38

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Solution

The fourth proportional to 105,646.15, 145,790.85 and 57,899.38 is: 79,900.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,646.15 : 145,790.85 = 57,899.38 : x
  2. Step 2: Convert to fraction form
    105,646.15/145,790.85 = 57,899.38/x
  3. Step 3: Cross multiply
    105,646.15x = 145,790.85 × 57,899.38
  4. Step 4: Simplify right side
    105,646.15x = 8,441,199,824.67
  5. Step 5: Solve for x
    x = 8,441,199,824.67/105,646.15
  6. Step 6: Final answer
    x = 79,900.69

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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.