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Finding the Fourth Proportional to 153,488.53, 211,810.98 and 85,505.41

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Solution

The fourth proportional to 153,488.53, 211,810.98 and 85,505.41 is: 117,995.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,488.53 : 211,810.98 = 85,505.41 : x
  2. Step 2: Convert to fraction form
    153,488.53/211,810.98 = 85,505.41/x
  3. Step 3: Cross multiply
    153,488.53x = 211,810.98 × 85,505.41
  4. Step 4: Simplify right side
    153,488.53x = 18,110,984,687.40
  5. Step 5: Solve for x
    x = 18,110,984,687.40/153,488.53
  6. Step 6: Final answer
    x = 117,995.69

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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.