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Finding the Fourth Proportional to 157,606.40, 217,488.84 and 85,985.84

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Solution

The fourth proportional to 157,606.40, 217,488.84 and 85,985.84 is: 118,656.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,606.40 : 217,488.84 = 85,985.84 : x
  2. Step 2: Convert to fraction form
    157,606.40/217,488.84 = 85,985.84/x
  3. Step 3: Cross multiply
    157,606.40x = 217,488.84 × 85,985.84
  4. Step 4: Simplify right side
    157,606.40x = 18,700,960,598.03
  5. Step 5: Solve for x
    x = 18,700,960,598.03/157,606.40
  6. Step 6: Final answer
    x = 118,656.10

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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.