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Finding the Fourth Proportional to 128,130.95, 176,903.85 and 114,678.87

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Solution

The fourth proportional to 128,130.95, 176,903.85 and 114,678.87 is: 158,331.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,130.95 : 176,903.85 = 114,678.87 : x
  2. Step 2: Convert to fraction form
    128,130.95/176,903.85 = 114,678.87/x
  3. Step 3: Cross multiply
    128,130.95x = 176,903.85 × 114,678.87
  4. Step 4: Simplify right side
    128,130.95x = 20,287,133,616.65
  5. Step 5: Solve for x
    x = 20,287,133,616.65/128,130.95
  6. Step 6: Final answer
    x = 158,331.26

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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.