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Finding the Fourth Proportional to 70,539.80, 97,347.72 and 38,709.83

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Solution

The fourth proportional to 70,539.80, 97,347.72 and 38,709.83 is: 53,421.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,539.80 : 97,347.72 = 38,709.83 : x
  2. Step 2: Convert to fraction form
    70,539.80/97,347.72 = 38,709.83/x
  3. Step 3: Cross multiply
    70,539.80x = 97,347.72 × 38,709.83
  4. Step 4: Simplify right side
    70,539.80x = 3,768,314,080.62
  5. Step 5: Solve for x
    x = 3,768,314,080.62/70,539.80
  6. Step 6: Final answer
    x = 53,421.11

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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.