Home / 153,711.15-212,137.70-90,102.39

Finding the Fourth Proportional to 153,711.15, 212,137.70 and 90,102.39

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Solution

The fourth proportional to 153,711.15, 212,137.70 and 90,102.39 is: 124,350.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,711.15 : 212,137.70 = 90,102.39 : x
  2. Step 2: Convert to fraction form
    153,711.15/212,137.70 = 90,102.39/x
  3. Step 3: Cross multiply
    153,711.15x = 212,137.70 × 90,102.39
  4. Step 4: Simplify right side
    153,711.15x = 19,114,113,328.59
  5. Step 5: Solve for x
    x = 19,114,113,328.59/153,711.15
  6. Step 6: Final answer
    x = 124,350.86

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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.