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Finding the Fourth Proportional to 141,798.58, 195,686.21 and 78,140.48

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Solution

The fourth proportional to 141,798.58, 195,686.21 and 78,140.48 is: 107,836.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,798.58 : 195,686.21 = 78,140.48 : x
  2. Step 2: Convert to fraction form
    141,798.58/195,686.21 = 78,140.48/x
  3. Step 3: Cross multiply
    141,798.58x = 195,686.21 × 78,140.48
  4. Step 4: Simplify right side
    141,798.58x = 15,291,014,378.78
  5. Step 5: Solve for x
    x = 15,291,014,378.78/141,798.58
  6. Step 6: Final answer
    x = 107,836.16

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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.