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Finding the Fourth Proportional to 88,090.64, 121,565.16 and 47,804.40

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Solution

The fourth proportional to 88,090.64, 121,565.16 and 47,804.40 is: 65,970.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,090.64 : 121,565.16 = 47,804.40 : x
  2. Step 2: Convert to fraction form
    88,090.64/121,565.16 = 47,804.40/x
  3. Step 3: Cross multiply
    88,090.64x = 121,565.16 × 47,804.40
  4. Step 4: Simplify right side
    88,090.64x = 5,811,349,928.25
  5. Step 5: Solve for x
    x = 5,811,349,928.25/88,090.64
  6. Step 6: Final answer
    x = 65,970.12

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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.