Home / 153,123.15-211,310.14-85,139.39

Finding the Fourth Proportional to 153,123.15, 211,310.14 and 85,139.39

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Solution

The fourth proportional to 153,123.15, 211,310.14 and 85,139.39 is: 117,492.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,123.15 : 211,310.14 = 85,139.39 : x
  2. Step 2: Convert to fraction form
    153,123.15/211,310.14 = 85,139.39/x
  3. Step 3: Cross multiply
    153,123.15x = 211,310.14 × 85,139.39
  4. Step 4: Simplify right side
    153,123.15x = 17,990,816,420.41
  5. Step 5: Solve for x
    x = 17,990,816,420.41/153,123.15
  6. Step 6: Final answer
    x = 117,492.47

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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.