Home / 145,034.16-217,547.79-85,440.57

Finding the Fourth Proportional to 145,034.16, 217,547.79 and 85,440.57

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Solution

The fourth proportional to 145,034.16, 217,547.79 and 85,440.57 is: 128,158.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,034.16 : 217,547.79 = 85,440.57 : x
  2. Step 2: Convert to fraction form
    145,034.16/217,547.79 = 85,440.57/x
  3. Step 3: Cross multiply
    145,034.16x = 217,547.79 × 85,440.57
  4. Step 4: Simplify right side
    145,034.16x = 18,587,407,179.84
  5. Step 5: Solve for x
    x = 18,587,407,179.84/145,034.16
  6. Step 6: Final answer
    x = 128,158.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.