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Finding the Fourth Proportional to 70,642.40, 97,488.12 and 38,809.28

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Solution

The fourth proportional to 70,642.40, 97,488.12 and 38,809.28 is: 53,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,642.40 : 97,488.12 = 38,809.28 : x
  2. Step 2: Convert to fraction form
    70,642.40/97,488.12 = 38,809.28/x
  3. Step 3: Cross multiply
    70,642.40x = 97,488.12 × 38,809.28
  4. Step 4: Simplify right side
    70,642.40x = 3,783,443,745.75
  5. Step 5: Solve for x
    x = 3,783,443,745.75/70,642.40
  6. Step 6: Final answer
    x = 53,557.69

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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.