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Finding the Fourth Proportional to 128,405.95, 192,483.70 and 53,547.52

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Solution

The fourth proportional to 128,405.95, 192,483.70 and 53,547.52 is: 80,269.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,405.95 : 192,483.70 = 53,547.52 : x
  2. Step 2: Convert to fraction form
    128,405.95/192,483.70 = 53,547.52/x
  3. Step 3: Cross multiply
    128,405.95x = 192,483.70 × 53,547.52
  4. Step 4: Simplify right side
    128,405.95x = 10,307,023,545.27
  5. Step 5: Solve for x
    x = 10,307,023,545.27/128,405.95
  6. Step 6: Final answer
    x = 80,269.05

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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.