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Finding the Fourth Proportional to 70,143.80, 96,798.45 and 38,312.78

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Solution

The fourth proportional to 70,143.80, 96,798.45 and 38,312.78 is: 52,871.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,143.80 : 96,798.45 = 38,312.78 : x
  2. Step 2: Convert to fraction form
    70,143.80/96,798.45 = 38,312.78/x
  3. Step 3: Cross multiply
    70,143.80x = 96,798.45 × 38,312.78
  4. Step 4: Simplify right side
    70,143.80x = 3,708,617,235.20
  5. Step 5: Solve for x
    x = 3,708,617,235.20/70,143.80
  6. Step 6: Final answer
    x = 52,871.64

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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.