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Finding the Fourth Proportional to 92,799.72, 128,130.39 and 57,038.22

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Solution

The fourth proportional to 92,799.72, 128,130.39 and 57,038.22 is: 78,753.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,799.72 : 128,130.39 = 57,038.22 : x
  2. Step 2: Convert to fraction form
    92,799.72/128,130.39 = 57,038.22/x
  3. Step 3: Cross multiply
    92,799.72x = 128,130.39 × 57,038.22
  4. Step 4: Simplify right side
    92,799.72x = 7,308,329,373.51
  5. Step 5: Solve for x
    x = 7,308,329,373.51/92,799.72
  6. Step 6: Final answer
    x = 78,753.79

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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.