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Finding the Fourth Proportional to 153,642.88, 211,915.20 and 117,426.16

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Solution

The fourth proportional to 153,642.88, 211,915.20 and 117,426.16 is: 161,962.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,642.88 : 211,915.20 = 117,426.16 : x
  2. Step 2: Convert to fraction form
    153,642.88/211,915.20 = 117,426.16/x
  3. Step 3: Cross multiply
    153,642.88x = 211,915.20 × 117,426.16
  4. Step 4: Simplify right side
    153,642.88x = 24,884,388,181.63
  5. Step 5: Solve for x
    x = 24,884,388,181.63/153,642.88
  6. Step 6: Final answer
    x = 161,962.52

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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.