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Finding the Fourth Proportional to 102,969.60, 154,452.12 and 28,088.40

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Solution

The fourth proportional to 102,969.60, 154,452.12 and 28,088.40 is: 42,131.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,969.60 : 154,452.12 = 28,088.40 : x
  2. Step 2: Convert to fraction form
    102,969.60/154,452.12 = 28,088.40/x
  3. Step 3: Cross multiply
    102,969.60x = 154,452.12 × 28,088.40
  4. Step 4: Simplify right side
    102,969.60x = 4,338,312,927.41
  5. Step 5: Solve for x
    x = 4,338,312,927.41/102,969.60
  6. Step 6: Final answer
    x = 42,131.98

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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.