Home / 153,715.39-212,126.79-85,732.45

Finding the Fourth Proportional to 153,715.39, 212,126.79 and 85,732.45

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Solution

The fourth proportional to 153,715.39, 212,126.79 and 85,732.45 is: 118,310.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,715.39 : 212,126.79 = 85,732.45 : x
  2. Step 2: Convert to fraction form
    153,715.39/212,126.79 = 85,732.45/x
  3. Step 3: Cross multiply
    153,715.39x = 212,126.79 × 85,732.45
  4. Step 4: Simplify right side
    153,715.39x = 18,186,149,417.34
  5. Step 5: Solve for x
    x = 18,186,149,417.34/153,715.39
  6. Step 6: Final answer
    x = 118,310.53

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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.