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Finding the Fourth Proportional to 153,629.65, 212,024.65 and 85,657.69

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Solution

The fourth proportional to 153,629.65, 212,024.65 and 85,657.69 is: 118,216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,629.65 : 212,024.65 = 85,657.69 : x
  2. Step 2: Convert to fraction form
    153,629.65/212,024.65 = 85,657.69/x
  3. Step 3: Cross multiply
    153,629.65x = 212,024.65 × 85,657.69
  4. Step 4: Simplify right side
    153,629.65x = 18,161,541,742.06
  5. Step 5: Solve for x
    x = 18,161,541,742.06/153,629.65
  6. Step 6: Final answer
    x = 118,216.38

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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.