Home / 105,159.03-145,113.30-57,402.78

Finding the Fourth Proportional to 105,159.03, 145,113.30 and 57,402.78

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Solution

The fourth proportional to 105,159.03, 145,113.30 and 57,402.78 is: 79,212.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,159.03 : 145,113.30 = 57,402.78 : x
  2. Step 2: Convert to fraction form
    105,159.03/145,113.30 = 57,402.78/x
  3. Step 3: Cross multiply
    105,159.03x = 145,113.30 × 57,402.78
  4. Step 4: Simplify right side
    105,159.03x = 8,329,906,834.97
  5. Step 5: Solve for x
    x = 8,329,906,834.97/105,159.03
  6. Step 6: Final answer
    x = 79,212.47

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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.