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Finding the Fourth Proportional to 162,088.80, 243,351.90 and 128,846.40

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Solution

The fourth proportional to 162,088.80, 243,351.90 and 128,846.40 is: 193,443.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,088.80 : 243,351.90 = 128,846.40 : x
  2. Step 2: Convert to fraction form
    162,088.80/243,351.90 = 128,846.40/x
  3. Step 3: Cross multiply
    162,088.80x = 243,351.90 × 128,846.40
  4. Step 4: Simplify right side
    162,088.80x = 31,355,016,248.16
  5. Step 5: Solve for x
    x = 31,355,016,248.16/162,088.80
  6. Step 6: Final answer
    x = 193,443.45

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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.