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Finding the Fourth Proportional to 78,307.74, 108,154.40 and 51,569.76

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Solution

The fourth proportional to 78,307.74, 108,154.40 and 51,569.76 is: 71,225.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,307.74 : 108,154.40 = 51,569.76 : x
  2. Step 2: Convert to fraction form
    78,307.74/108,154.40 = 51,569.76/x
  3. Step 3: Cross multiply
    78,307.74x = 108,154.40 × 51,569.76
  4. Step 4: Simplify right side
    78,307.74x = 5,577,496,193.10
  5. Step 5: Solve for x
    x = 5,577,496,193.10/78,307.74
  6. Step 6: Final answer
    x = 71,225.35

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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.