Home / 128,018.16-176,667.48-74,307.60

Finding the Fourth Proportional to 128,018.16, 176,667.48 and 74,307.60

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Solution

The fourth proportional to 128,018.16, 176,667.48 and 74,307.60 is: 102,545.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,018.16 : 176,667.48 = 74,307.60 : x
  2. Step 2: Convert to fraction form
    128,018.16/176,667.48 = 74,307.60/x
  3. Step 3: Cross multiply
    128,018.16x = 176,667.48 × 74,307.60
  4. Step 4: Simplify right side
    128,018.16x = 13,127,736,436.85
  5. Step 5: Solve for x
    x = 13,127,736,436.85/128,018.16
  6. Step 6: Final answer
    x = 102,545.89

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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.