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Finding the Fourth Proportional to 64,990.98, 97,501.05 and 20,619.18

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Solution

The fourth proportional to 64,990.98, 97,501.05 and 20,619.18 is: 30,933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,990.98 : 97,501.05 = 20,619.18 : x
  2. Step 2: Convert to fraction form
    64,990.98/97,501.05 = 20,619.18/x
  3. Step 3: Cross multiply
    64,990.98x = 97,501.05 × 20,619.18
  4. Step 4: Simplify right side
    64,990.98x = 2,010,391,700.14
  5. Step 5: Solve for x
    x = 2,010,391,700.14/64,990.98
  6. Step 6: Final answer
    x = 30,933.40

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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.