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Finding the Fourth Proportional to 157,139.69, 216,848.61 and 85,518.18

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Solution

The fourth proportional to 157,139.69, 216,848.61 and 85,518.18 is: 118,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,139.69 : 216,848.61 = 85,518.18 : x
  2. Step 2: Convert to fraction form
    157,139.69/216,848.61 = 85,518.18/x
  3. Step 3: Cross multiply
    157,139.69x = 216,848.61 × 85,518.18
  4. Step 4: Simplify right side
    157,139.69x = 18,544,498,462.73
  5. Step 5: Solve for x
    x = 18,544,498,462.73/157,139.69
  6. Step 6: Final answer
    x = 118,012.82

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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.