Home / 103,387.78-142,688.55-63,106.89

Finding the Fourth Proportional to 103,387.78, 142,688.55 and 63,106.89

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Solution

The fourth proportional to 103,387.78, 142,688.55 and 63,106.89 is: 87,095.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,387.78 : 142,688.55 = 63,106.89 : x
  2. Step 2: Convert to fraction form
    103,387.78/142,688.55 = 63,106.89/x
  3. Step 3: Cross multiply
    103,387.78x = 142,688.55 × 63,106.89
  4. Step 4: Simplify right side
    103,387.78x = 9,004,630,629.11
  5. Step 5: Solve for x
    x = 9,004,630,629.11/103,387.78
  6. Step 6: Final answer
    x = 87,095.70

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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.