Home / 128,066.16-176,715-71,479.92

Finding the Fourth Proportional to 128,066.16, 176,715 and 71,479.92

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Solution

The fourth proportional to 128,066.16, 176,715 and 71,479.92 is: 98,633.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.16 : 176,715 = 71,479.92 : x
  2. Step 2: Convert to fraction form
    128,066.16/176,715 = 71,479.92/x
  3. Step 3: Cross multiply
    128,066.16x = 176,715 × 71,479.92
  4. Step 4: Simplify right side
    128,066.16x = 12,631,574,062.80
  5. Step 5: Solve for x
    x = 12,631,574,062.80/128,066.16
  6. Step 6: Final answer
    x = 98,633.19

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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.