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Finding the Fourth Proportional to 162,428.80, 243,643.20 and 155,430.40

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Solution

The fourth proportional to 162,428.80, 243,643.20 and 155,430.40 is: 233,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,428.80 : 243,643.20 = 155,430.40 : x
  2. Step 2: Convert to fraction form
    162,428.80/243,643.20 = 155,430.40/x
  3. Step 3: Cross multiply
    162,428.80x = 243,643.20 × 155,430.40
  4. Step 4: Simplify right side
    162,428.80x = 37,869,560,033.28
  5. Step 5: Solve for x
    x = 37,869,560,033.28/162,428.80
  6. Step 6: Final answer
    x = 233,145.60

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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.