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Finding the Fourth Proportional to 70,438.88, 105,037.48 and 69,807.20

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Solution

The fourth proportional to 70,438.88, 105,037.48 and 69,807.20 is: 104,095.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,438.88 : 105,037.48 = 69,807.20 : x
  2. Step 2: Convert to fraction form
    70,438.88/105,037.48 = 69,807.20/x
  3. Step 3: Cross multiply
    70,438.88x = 105,037.48 × 69,807.20
  4. Step 4: Simplify right side
    70,438.88x = 7,332,372,373.86
  5. Step 5: Solve for x
    x = 7,332,372,373.86/70,438.88
  6. Step 6: Final answer
    x = 104,095.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.