Home / 128,210.40-176,927.76-77,925.60

Finding the Fourth Proportional to 128,210.40, 176,927.76 and 77,925.60

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Solution

The fourth proportional to 128,210.40, 176,927.76 and 77,925.60 is: 107,535.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,210.40 : 176,927.76 = 77,925.60 : x
  2. Step 2: Convert to fraction form
    128,210.40/176,927.76 = 77,925.60/x
  3. Step 3: Cross multiply
    128,210.40x = 176,927.76 × 77,925.60
  4. Step 4: Simplify right side
    128,210.40x = 13,787,201,854.66
  5. Step 5: Solve for x
    x = 13,787,201,854.66/128,210.40
  6. Step 6: Final answer
    x = 107,535.75

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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.