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Finding the Fourth Proportional to 72,598.56, 109,436.51 and 66,292.32

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Solution

The fourth proportional to 72,598.56, 109,436.51 and 66,292.32 is: 99,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,598.56 : 109,436.51 = 66,292.32 : x
  2. Step 2: Convert to fraction form
    72,598.56/109,436.51 = 66,292.32/x
  3. Step 3: Cross multiply
    72,598.56x = 109,436.51 × 66,292.32
  4. Step 4: Simplify right side
    72,598.56x = 7,254,799,809.14
  5. Step 5: Solve for x
    x = 7,254,799,809.14/72,598.56
  6. Step 6: Final answer
    x = 99,930.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.