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Finding the Fourth Proportional to 153,620.88, 211,996.32 and 85,637.10

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Solution

The fourth proportional to 153,620.88, 211,996.32 and 85,637.10 is: 118,178.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,620.88 : 211,996.32 = 85,637.10 : x
  2. Step 2: Convert to fraction form
    153,620.88/211,996.32 = 85,637.10/x
  3. Step 3: Cross multiply
    153,620.88x = 211,996.32 × 85,637.10
  4. Step 4: Simplify right side
    153,620.88x = 18,154,750,055.47
  5. Step 5: Solve for x
    x = 18,154,750,055.47/153,620.88
  6. Step 6: Final answer
    x = 118,178.92

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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.