Home / 105,557.42-145,669.30-57,813.78

Finding the Fourth Proportional to 105,557.42, 145,669.30 and 57,813.78

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Solution

The fourth proportional to 105,557.42, 145,669.30 and 57,813.78 is: 79,783.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,557.42 : 145,669.30 = 57,813.78 : x
  2. Step 2: Convert to fraction form
    105,557.42/145,669.30 = 57,813.78/x
  3. Step 3: Cross multiply
    105,557.42x = 145,669.30 × 57,813.78
  4. Step 4: Simplify right side
    105,557.42x = 8,421,692,862.95
  5. Step 5: Solve for x
    x = 8,421,692,862.95/105,557.42
  6. Step 6: Final answer
    x = 79,783.05

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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.