Home / 105,689.40-145,851.33-57,941.72

Finding the Fourth Proportional to 105,689.40, 145,851.33 and 57,941.72

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Solution

The fourth proportional to 105,689.40, 145,851.33 and 57,941.72 is: 79,959.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,689.40 : 145,851.33 = 57,941.72 : x
  2. Step 2: Convert to fraction form
    105,689.40/145,851.33 = 57,941.72/x
  3. Step 3: Cross multiply
    105,689.40x = 145,851.33 × 57,941.72
  4. Step 4: Simplify right side
    105,689.40x = 8,450,876,924.49
  5. Step 5: Solve for x
    x = 8,450,876,924.49/105,689.40
  6. Step 6: Final answer
    x = 79,959.55

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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.