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Finding the Fourth Proportional to 153,395.12, 211,699.56 and 89,728.88

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Solution

The fourth proportional to 153,395.12, 211,699.56 and 89,728.88 is: 123,834.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,395.12 : 211,699.56 = 89,728.88 : x
  2. Step 2: Convert to fraction form
    153,395.12/211,699.56 = 89,728.88/x
  3. Step 3: Cross multiply
    153,395.12x = 211,699.56 × 89,728.88
  4. Step 4: Simplify right side
    153,395.12x = 18,995,564,415.29
  5. Step 5: Solve for x
    x = 18,995,564,415.29/153,395.12
  6. Step 6: Final answer
    x = 123,834.22

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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.