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Finding the Fourth Proportional to 102,218.40, 153,327.60 and 85,888.80

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Solution

The fourth proportional to 102,218.40, 153,327.60 and 85,888.80 is: 128,833.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,218.40 : 153,327.60 = 85,888.80 : x
  2. Step 2: Convert to fraction form
    102,218.40/153,327.60 = 85,888.80/x
  3. Step 3: Cross multiply
    102,218.40x = 153,327.60 × 85,888.80
  4. Step 4: Simplify right side
    102,218.40x = 13,169,123,570.88
  5. Step 5: Solve for x
    x = 13,169,123,570.88/102,218.40
  6. Step 6: Final answer
    x = 128,833.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.