Home / 153,839.12-212,308.65-85,869.36

Finding the Fourth Proportional to 153,839.12, 212,308.65 and 85,869.36

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Solution

The fourth proportional to 153,839.12, 212,308.65 and 85,869.36 is: 118,505.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,839.12 : 212,308.65 = 85,869.36 : x
  2. Step 2: Convert to fraction form
    153,839.12/212,308.65 = 85,869.36/x
  3. Step 3: Cross multiply
    153,839.12x = 212,308.65 × 85,869.36
  4. Step 4: Simplify right side
    153,839.12x = 18,230,807,897.96
  5. Step 5: Solve for x
    x = 18,230,807,897.96/153,839.12
  6. Step 6: Final answer
    x = 118,505.67

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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.