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Finding the Fourth Proportional to 92,989.83, 128,109.02 and 64,646.31

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Solution

The fourth proportional to 92,989.83, 128,109.02 and 64,646.31 is: 89,061.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,989.83 : 128,109.02 = 64,646.31 : x
  2. Step 2: Convert to fraction form
    92,989.83/128,109.02 = 64,646.31/x
  3. Step 3: Cross multiply
    92,989.83x = 128,109.02 × 64,646.31
  4. Step 4: Simplify right side
    92,989.83x = 8,281,775,097.48
  5. Step 5: Solve for x
    x = 8,281,775,097.48/92,989.83
  6. Step 6: Final answer
    x = 89,061.08

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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.