Home / 78,518.85-108,357.80-42,710.78

Finding the Fourth Proportional to 78,518.85, 108,357.80 and 42,710.78

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Solution

The fourth proportional to 78,518.85, 108,357.80 and 42,710.78 is: 58,941.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,518.85 : 108,357.80 = 42,710.78 : x
  2. Step 2: Convert to fraction form
    78,518.85/108,357.80 = 42,710.78/x
  3. Step 3: Cross multiply
    78,518.85x = 108,357.80 × 42,710.78
  4. Step 4: Simplify right side
    78,518.85x = 4,628,045,401.74
  5. Step 5: Solve for x
    x = 4,628,045,401.74/78,518.85
  6. Step 6: Final answer
    x = 58,941.84

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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.