Home / 70,402.47-105,632.86-28,312.39

Finding the Fourth Proportional to 70,402.47, 105,632.86 and 28,312.39

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Solution

The fourth proportional to 70,402.47, 105,632.86 and 28,312.39 is: 42,480.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,402.47 : 105,632.86 = 28,312.39 : x
  2. Step 2: Convert to fraction form
    70,402.47/105,632.86 = 28,312.39/x
  3. Step 3: Cross multiply
    70,402.47x = 105,632.86 × 28,312.39
  4. Step 4: Simplify right side
    70,402.47x = 2,990,718,249.30
  5. Step 5: Solve for x
    x = 2,990,718,249.30/70,402.47
  6. Step 6: Final answer
    x = 42,480.31

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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.