Home / 153,688.12-212,090.51-85,709.39

Finding the Fourth Proportional to 153,688.12, 212,090.51 and 85,709.39

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Solution

The fourth proportional to 153,688.12, 212,090.51 and 85,709.39 is: 118,279.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,688.12 : 212,090.51 = 85,709.39 : x
  2. Step 2: Convert to fraction form
    153,688.12/212,090.51 = 85,709.39/x
  3. Step 3: Cross multiply
    153,688.12x = 212,090.51 × 85,709.39
  4. Step 4: Simplify right side
    153,688.12x = 18,178,147,390.71
  5. Step 5: Solve for x
    x = 18,178,147,390.71/153,688.12
  6. Step 6: Final answer
    x = 118,279.46

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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.