Home / 128,017.08-176,532.48-84,981.40

Finding the Fourth Proportional to 128,017.08, 176,532.48 and 84,981.40

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Solution

The fourth proportional to 128,017.08, 176,532.48 and 84,981.40 is: 117,187.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017.08 : 176,532.48 = 84,981.40 : x
  2. Step 2: Convert to fraction form
    128,017.08/176,532.48 = 84,981.40/x
  3. Step 3: Cross multiply
    128,017.08x = 176,532.48 × 84,981.40
  4. Step 4: Simplify right side
    128,017.08x = 15,001,977,295.87
  5. Step 5: Solve for x
    x = 15,001,977,295.87/128,017.08
  6. Step 6: Final answer
    x = 117,187.31

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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.