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Finding the Fourth Proportional to 153,019.13, 211,191.47 and 127,485

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Solution

The fourth proportional to 153,019.13, 211,191.47 and 127,485 is: 175,950.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,019.13 : 211,191.47 = 127,485 : x
  2. Step 2: Convert to fraction form
    153,019.13/211,191.47 = 127,485/x
  3. Step 3: Cross multiply
    153,019.13x = 211,191.47 × 127,485
  4. Step 4: Simplify right side
    153,019.13x = 26,923,743,915.53
  5. Step 5: Solve for x
    x = 26,923,743,915.53/153,019.13
  6. Step 6: Final answer
    x = 175,950.19

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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.