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Finding the Fourth Proportional to 72,116.04, 98,990.44 and 63,980.40

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Solution

The fourth proportional to 72,116.04, 98,990.44 and 63,980.40 is: 87,823.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,116.04 : 98,990.44 = 63,980.40 : x
  2. Step 2: Convert to fraction form
    72,116.04/98,990.44 = 63,980.40/x
  3. Step 3: Cross multiply
    72,116.04x = 98,990.44 × 63,980.40
  4. Step 4: Simplify right side
    72,116.04x = 6,333,447,947.38
  5. Step 5: Solve for x
    x = 6,333,447,947.38/72,116.04
  6. Step 6: Final answer
    x = 87,823.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.