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Finding the Fourth Proportional to 65,907.12, 90,946.08 and 39,045.08

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Solution

The fourth proportional to 65,907.12, 90,946.08 and 39,045.08 is: 53,878.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,907.12 : 90,946.08 = 39,045.08 : x
  2. Step 2: Convert to fraction form
    65,907.12/90,946.08 = 39,045.08/x
  3. Step 3: Cross multiply
    65,907.12x = 90,946.08 × 39,045.08
  4. Step 4: Simplify right side
    65,907.12x = 3,550,996,969.29
  5. Step 5: Solve for x
    x = 3,550,996,969.29/65,907.12
  6. Step 6: Final answer
    x = 53,878.81

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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.