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Finding the Fourth Proportional to 128,068.79, 176,718.62 and 71,482.55

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Solution

The fourth proportional to 128,068.79, 176,718.62 and 71,482.55 is: 98,636.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,068.79 : 176,718.62 = 71,482.55 : x
  2. Step 2: Convert to fraction form
    128,068.79/176,718.62 = 71,482.55/x
  3. Step 3: Cross multiply
    128,068.79x = 176,718.62 × 71,482.55
  4. Step 4: Simplify right side
    128,068.79x = 12,632,296,885.19
  5. Step 5: Solve for x
    x = 12,632,296,885.19/128,068.79
  6. Step 6: Final answer
    x = 98,636.81

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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.