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Finding the Fourth Proportional to 153,372.16, 211,585.36 and 89,681.88

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Solution

The fourth proportional to 153,372.16, 211,585.36 and 89,681.88 is: 123,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,372.16 : 211,585.36 = 89,681.88 : x
  2. Step 2: Convert to fraction form
    153,372.16/211,585.36 = 89,681.88/x
  3. Step 3: Cross multiply
    153,372.16x = 211,585.36 × 89,681.88
  4. Step 4: Simplify right side
    153,372.16x = 18,975,372,865.28
  5. Step 5: Solve for x
    x = 18,975,372,865.28/153,372.16
  6. Step 6: Final answer
    x = 123,721.10

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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.