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Finding the Fourth Proportional to 72,653.04, 109,055.88 and 64,386

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Solution

The fourth proportional to 72,653.04, 109,055.88 and 64,386 is: 96,646.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,653.04 : 109,055.88 = 64,386 : x
  2. Step 2: Convert to fraction form
    72,653.04/109,055.88 = 64,386/x
  3. Step 3: Cross multiply
    72,653.04x = 109,055.88 × 64,386
  4. Step 4: Simplify right side
    72,653.04x = 7,021,671,889.68
  5. Step 5: Solve for x
    x = 7,021,671,889.68/72,653.04
  6. Step 6: Final answer
    x = 96,646.64

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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.