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Finding the Fourth Proportional to 92,920.45, 138,678.47 and 83,952.40

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Solution

The fourth proportional to 92,920.45, 138,678.47 and 83,952.40 is: 125,294.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,920.45 : 138,678.47 = 83,952.40 : x
  2. Step 2: Convert to fraction form
    92,920.45/138,678.47 = 83,952.40/x
  3. Step 3: Cross multiply
    92,920.45x = 138,678.47 × 83,952.40
  4. Step 4: Simplify right side
    92,920.45x = 11,642,390,384.83
  5. Step 5: Solve for x
    x = 11,642,390,384.83/92,920.45
  6. Step 6: Final answer
    x = 125,294.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.