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Finding the Fourth Proportional to 211,186.40, 316,746.58 and 69,030.60

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Solution

The fourth proportional to 211,186.40, 316,746.58 and 69,030.60 is: 103,535.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,186.40 : 316,746.58 = 69,030.60 : x
  2. Step 2: Convert to fraction form
    211,186.40/316,746.58 = 69,030.60/x
  3. Step 3: Cross multiply
    211,186.40x = 316,746.58 × 69,030.60
  4. Step 4: Simplify right side
    211,186.40x = 21,865,206,465.35
  5. Step 5: Solve for x
    x = 21,865,206,465.35/211,186.40
  6. Step 6: Final answer
    x = 103,535.11

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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.