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Finding the Fourth Proportional to 153,138.48, 211,347.72 and 89,497.68

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Solution

The fourth proportional to 153,138.48, 211,347.72 and 89,497.68 is: 123,516.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,138.48 : 211,347.72 = 89,497.68 : x
  2. Step 2: Convert to fraction form
    153,138.48/211,347.72 = 89,497.68/x
  3. Step 3: Cross multiply
    153,138.48x = 211,347.72 × 89,497.68
  4. Step 4: Simplify right side
    153,138.48x = 18,915,130,613.29
  5. Step 5: Solve for x
    x = 18,915,130,613.29/153,138.48
  6. Step 6: Final answer
    x = 123,516.51

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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.