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Finding the Fourth Proportional to 210,638.81, 315,892.58 and 70,364.63

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Solution

The fourth proportional to 210,638.81, 315,892.58 and 70,364.63 is: 105,525.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,638.81 : 315,892.58 = 70,364.63 : x
  2. Step 2: Convert to fraction form
    210,638.81/315,892.58 = 70,364.63/x
  3. Step 3: Cross multiply
    210,638.81x = 315,892.58 × 70,364.63
  4. Step 4: Simplify right side
    210,638.81x = 22,227,662,580.16
  5. Step 5: Solve for x
    x = 22,227,662,580.16/210,638.81
  6. Step 6: Final answer
    x = 105,525.01

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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.