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Finding the Fourth Proportional to 53,547.20, 80,320.80 and 53,158.40

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Solution

The fourth proportional to 53,547.20, 80,320.80 and 53,158.40 is: 79,737.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,547.20 : 80,320.80 = 53,158.40 : x
  2. Step 2: Convert to fraction form
    53,547.20/80,320.80 = 53,158.40/x
  3. Step 3: Cross multiply
    53,547.20x = 80,320.80 × 53,158.40
  4. Step 4: Simplify right side
    53,547.20x = 4,269,725,214.72
  5. Step 5: Solve for x
    x = 4,269,725,214.72/53,547.20
  6. Step 6: Final answer
    x = 79,737.60

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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.