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Finding the Fourth Proportional to 74,703.20, 112,054.80 and 66,538.40

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Solution

The fourth proportional to 74,703.20, 112,054.80 and 66,538.40 is: 99,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,703.20 : 112,054.80 = 66,538.40 : x
  2. Step 2: Convert to fraction form
    74,703.20/112,054.80 = 66,538.40/x
  3. Step 3: Cross multiply
    74,703.20x = 112,054.80 × 66,538.40
  4. Step 4: Simplify right side
    74,703.20x = 7,455,947,104.32
  5. Step 5: Solve for x
    x = 7,455,947,104.32/74,703.20
  6. Step 6: Final answer
    x = 99,807.60

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1.5x scale

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.