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Finding the Fourth Proportional to 154,461.78, 213,154.27 and 86,478.89

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Solution

The fourth proportional to 154,461.78, 213,154.27 and 86,478.89 is: 119,339.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,461.78 : 213,154.27 = 86,478.89 : x
  2. Step 2: Convert to fraction form
    154,461.78/213,154.27 = 86,478.89/x
  3. Step 3: Cross multiply
    154,461.78x = 213,154.27 × 86,478.89
  4. Step 4: Simplify right side
    154,461.78x = 18,433,343,386.39
  5. Step 5: Solve for x
    x = 18,433,343,386.39/154,461.78
  6. Step 6: Final answer
    x = 119,339.19

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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.