Home / 128,021.32-176,641.08-74,275.16

Finding the Fourth Proportional to 128,021.32, 176,641.08 and 74,275.16

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Solution

The fourth proportional to 128,021.32, 176,641.08 and 74,275.16 is: 102,483.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,021.32 : 176,641.08 = 74,275.16 : x
  2. Step 2: Convert to fraction form
    128,021.32/176,641.08 = 74,275.16/x
  3. Step 3: Cross multiply
    128,021.32x = 176,641.08 × 74,275.16
  4. Step 4: Simplify right side
    128,021.32x = 13,120,044,479.57
  5. Step 5: Solve for x
    x = 13,120,044,479.57/128,021.32
  6. Step 6: Final answer
    x = 102,483.28

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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.