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Finding the Fourth Proportional to 70,501.50, 105,740.91 and 20,569.86

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Solution

The fourth proportional to 70,501.50, 105,740.91 and 20,569.86 is: 30,851.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,501.50 : 105,740.91 = 20,569.86 : x
  2. Step 2: Convert to fraction form
    70,501.50/105,740.91 = 20,569.86/x
  3. Step 3: Cross multiply
    70,501.50x = 105,740.91 × 20,569.86
  4. Step 4: Simplify right side
    70,501.50x = 2,175,075,714.97
  5. Step 5: Solve for x
    x = 2,175,075,714.97/70,501.50
  6. Step 6: Final answer
    x = 30,851.48

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1.5x scale

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.