Home / 128,210.16-176,930.40-71,623.68

Finding the Fourth Proportional to 128,210.16, 176,930.40 and 71,623.68

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Solution

The fourth proportional to 128,210.16, 176,930.40 and 71,623.68 is: 98,840.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,210.16 : 176,930.40 = 71,623.68 : x
  2. Step 2: Convert to fraction form
    128,210.16/176,930.40 = 71,623.68/x
  3. Step 3: Cross multiply
    128,210.16x = 176,930.40 × 71,623.68
  4. Step 4: Simplify right side
    128,210.16x = 12,672,406,351.87
  5. Step 5: Solve for x
    x = 12,672,406,351.87/128,210.16
  6. Step 6: Final answer
    x = 98,840.89

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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.