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Finding the Fourth Proportional to 215,547.20, 323,320.80 and 75,287.60

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Solution

The fourth proportional to 215,547.20, 323,320.80 and 75,287.60 is: 112,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,547.20 : 323,320.80 = 75,287.60 : x
  2. Step 2: Convert to fraction form
    215,547.20/323,320.80 = 75,287.60/x
  3. Step 3: Cross multiply
    215,547.20x = 323,320.80 × 75,287.60
  4. Step 4: Simplify right side
    215,547.20x = 24,342,047,062.08
  5. Step 5: Solve for x
    x = 24,342,047,062.08/215,547.20
  6. Step 6: Final answer
    x = 112,931.40

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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.