Home / 70,430.86-105,505.45-42,335.67

Finding the Fourth Proportional to 70,430.86, 105,505.45 and 42,335.67

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Solution

The fourth proportional to 70,430.86, 105,505.45 and 42,335.67 is: 63,418.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,430.86 : 105,505.45 = 42,335.67 : x
  2. Step 2: Convert to fraction form
    70,430.86/105,505.45 = 42,335.67/x
  3. Step 3: Cross multiply
    70,430.86x = 105,505.45 × 42,335.67
  4. Step 4: Simplify right side
    70,430.86x = 4,466,643,808.56
  5. Step 5: Solve for x
    x = 4,466,643,808.56/70,430.86
  6. Step 6: Final answer
    x = 63,418.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.