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Finding the Fourth Proportional to 210,219.53, 315,141.74 and 77,068.69

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Solution

The fourth proportional to 210,219.53, 315,141.74 and 77,068.69 is: 115,534.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,219.53 : 315,141.74 = 77,068.69 : x
  2. Step 2: Convert to fraction form
    210,219.53/315,141.74 = 77,068.69/x
  3. Step 3: Cross multiply
    210,219.53x = 315,141.74 × 77,068.69
  4. Step 4: Simplify right side
    210,219.53x = 24,287,561,066.12
  5. Step 5: Solve for x
    x = 24,287,561,066.12/210,219.53
  6. Step 6: Final answer
    x = 115,534.28

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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.