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Finding the Fourth Proportional to 153,125, 211,319.52 and 85,148.92

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Solution

The fourth proportional to 153,125, 211,319.52 and 85,148.92 is: 117,509.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,125 : 211,319.52 = 85,148.92 : x
  2. Step 2: Convert to fraction form
    153,125/211,319.52 = 85,148.92/x
  3. Step 3: Cross multiply
    153,125x = 211,319.52 × 85,148.92
  4. Step 4: Simplify right side
    153,125x = 17,993,628,902.92
  5. Step 5: Solve for x
    x = 17,993,628,902.92/153,125
  6. Step 6: Final answer
    x = 117,509.41

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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.