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Finding the Fourth Proportional to 85,648, 118,267.20 and 53,870.08

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Solution

The fourth proportional to 85,648, 118,267.20 and 53,870.08 is: 74,386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,648 : 118,267.20 = 53,870.08 : x
  2. Step 2: Convert to fraction form
    85,648/118,267.20 = 53,870.08/x
  3. Step 3: Cross multiply
    85,648x = 118,267.20 × 53,870.08
  4. Step 4: Simplify right side
    85,648x = 6,371,063,525.38
  5. Step 5: Solve for x
    x = 6,371,063,525.38/85,648
  6. Step 6: Final answer
    x = 74,386.60

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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.