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Finding the Fourth Proportional to 144,953.90, 217,430.85 and 70,109.90

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Solution

The fourth proportional to 144,953.90, 217,430.85 and 70,109.90 is: 105,164.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,953.90 : 217,430.85 = 70,109.90 : x
  2. Step 2: Convert to fraction form
    144,953.90/217,430.85 = 70,109.90/x
  3. Step 3: Cross multiply
    144,953.90x = 217,430.85 × 70,109.90
  4. Step 4: Simplify right side
    144,953.90x = 15,244,055,150.42
  5. Step 5: Solve for x
    x = 15,244,055,150.42/144,953.90
  6. Step 6: Final answer
    x = 105,164.85

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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.