Home / 128,516.04-177,345.18-71,916.48

Finding the Fourth Proportional to 128,516.04, 177,345.18 and 71,916.48

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Solution

The fourth proportional to 128,516.04, 177,345.18 and 71,916.48 is: 99,240.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,516.04 : 177,345.18 = 71,916.48 : x
  2. Step 2: Convert to fraction form
    128,516.04/177,345.18 = 71,916.48/x
  3. Step 3: Cross multiply
    128,516.04x = 177,345.18 × 71,916.48
  4. Step 4: Simplify right side
    128,516.04x = 12,754,041,090.57
  5. Step 5: Solve for x
    x = 12,754,041,090.57/128,516.04
  6. Step 6: Final answer
    x = 99,240.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.