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Finding the Fourth Proportional to 145,989.60, 218,638.80 and 90,002.40

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Solution

The fourth proportional to 145,989.60, 218,638.80 and 90,002.40 is: 134,790.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,989.60 : 218,638.80 = 90,002.40 : x
  2. Step 2: Convert to fraction form
    145,989.60/218,638.80 = 90,002.40/x
  3. Step 3: Cross multiply
    145,989.60x = 218,638.80 × 90,002.40
  4. Step 4: Simplify right side
    145,989.60x = 19,678,016,733.12
  5. Step 5: Solve for x
    x = 19,678,016,733.12/145,989.60
  6. Step 6: Final answer
    x = 134,790.54

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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.