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Finding the Fourth Proportional to 157,008.68, 216,673.56 and 85,390.28

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Solution

The fourth proportional to 157,008.68, 216,673.56 and 85,390.28 is: 117,839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,008.68 : 216,673.56 = 85,390.28 : x
  2. Step 2: Convert to fraction form
    157,008.68/216,673.56 = 85,390.28/x
  3. Step 3: Cross multiply
    157,008.68x = 216,673.56 × 85,390.28
  4. Step 4: Simplify right side
    157,008.68x = 18,501,814,873.63
  5. Step 5: Solve for x
    x = 18,501,814,873.63/157,008.68
  6. Step 6: Final answer
    x = 117,839.44

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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.