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Finding the Fourth Proportional to 153,658.68, 211,908.06 and 105,330.84

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Solution

The fourth proportional to 153,658.68, 211,908.06 and 105,330.84 is: 145,259.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,658.68 : 211,908.06 = 105,330.84 : x
  2. Step 2: Convert to fraction form
    153,658.68/211,908.06 = 105,330.84/x
  3. Step 3: Cross multiply
    153,658.68x = 211,908.06 × 105,330.84
  4. Step 4: Simplify right side
    153,658.68x = 22,320,453,962.57
  5. Step 5: Solve for x
    x = 22,320,453,962.57/153,658.68
  6. Step 6: Final answer
    x = 145,259.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.