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Finding the Fourth Proportional to 153,419.67, 211,718.48 and 85,437.45

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Solution

The fourth proportional to 153,419.67, 211,718.48 and 85,437.45 is: 117,903.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,419.67 : 211,718.48 = 85,437.45 : x
  2. Step 2: Convert to fraction form
    153,419.67/211,718.48 = 85,437.45/x
  3. Step 3: Cross multiply
    153,419.67x = 211,718.48 × 85,437.45
  4. Step 4: Simplify right side
    153,419.67x = 18,088,686,621.89
  5. Step 5: Solve for x
    x = 18,088,686,621.89/153,419.67
  6. Step 6: Final answer
    x = 117,903.31

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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.