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Finding the Fourth Proportional to 69,148.80, 95,378.40 and 42,256.80

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Solution

The fourth proportional to 69,148.80, 95,378.40 and 42,256.80 is: 58,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,148.80 : 95,378.40 = 42,256.80 : x
  2. Step 2: Convert to fraction form
    69,148.80/95,378.40 = 42,256.80/x
  3. Step 3: Cross multiply
    69,148.80x = 95,378.40 × 42,256.80
  4. Step 4: Simplify right side
    69,148.80x = 4,030,385,973.12
  5. Step 5: Solve for x
    x = 4,030,385,973.12/69,148.80
  6. Step 6: Final answer
    x = 58,285.70

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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.