Home / 105,097.20-145,031.40-57,351.12

Finding the Fourth Proportional to 105,097.20, 145,031.40 and 57,351.12

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Solution

The fourth proportional to 105,097.20, 145,031.40 and 57,351.12 is: 79,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,097.20 : 145,031.40 = 57,351.12 : x
  2. Step 2: Convert to fraction form
    105,097.20/145,031.40 = 57,351.12/x
  3. Step 3: Cross multiply
    105,097.20x = 145,031.40 × 57,351.12
  4. Step 4: Simplify right side
    105,097.20x = 8,317,713,225.17
  5. Step 5: Solve for x
    x = 8,317,713,225.17/105,097.20
  6. Step 6: Final answer
    x = 79,143.05

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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.