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Finding the Fourth Proportional to 85,909.80, 118,669.08 and 71,616.32

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Solution

The fourth proportional to 85,909.80, 118,669.08 and 71,616.32 is: 98,925.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909.80 : 118,669.08 = 71,616.32 : x
  2. Step 2: Convert to fraction form
    85,909.80/118,669.08 = 71,616.32/x
  3. Step 3: Cross multiply
    85,909.80x = 118,669.08 × 71,616.32
  4. Step 4: Simplify right side
    85,909.80x = 8,498,642,807.39
  5. Step 5: Solve for x
    x = 8,498,642,807.39/85,909.80
  6. Step 6: Final answer
    x = 98,925.18

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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.