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Finding the Fourth Proportional to 86,931.66, 130,397.49 and 45,368.94

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Solution

The fourth proportional to 86,931.66, 130,397.49 and 45,368.94 is: 68,053.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,931.66 : 130,397.49 = 45,368.94 : x
  2. Step 2: Convert to fraction form
    86,931.66/130,397.49 = 45,368.94/x
  3. Step 3: Cross multiply
    86,931.66x = 130,397.49 × 45,368.94
  4. Step 4: Simplify right side
    86,931.66x = 5,915,995,899.96
  5. Step 5: Solve for x
    x = 5,915,995,899.96/86,931.66
  6. Step 6: Final answer
    x = 68,053.41

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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.