Home / 78,103.17-107,782.65-42,293.07

Finding the Fourth Proportional to 78,103.17, 107,782.65 and 42,293.07

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Solution

The fourth proportional to 78,103.17, 107,782.65 and 42,293.07 is: 58,364.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,103.17 : 107,782.65 = 42,293.07 : x
  2. Step 2: Convert to fraction form
    78,103.17/107,782.65 = 42,293.07/x
  3. Step 3: Cross multiply
    78,103.17x = 107,782.65 × 42,293.07
  4. Step 4: Simplify right side
    78,103.17x = 4,558,459,161.24
  5. Step 5: Solve for x
    x = 4,558,459,161.24/78,103.17
  6. Step 6: Final answer
    x = 58,364.59

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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.