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Finding the Fourth Proportional to 93,251.12, 139,904.52 and 87,681.20

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Solution

The fourth proportional to 93,251.12, 139,904.52 and 87,681.20 is: 131,547.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,251.12 : 139,904.52 = 87,681.20 : x
  2. Step 2: Convert to fraction form
    93,251.12/139,904.52 = 87,681.20/x
  3. Step 3: Cross multiply
    93,251.12x = 139,904.52 × 87,681.20
  4. Step 4: Simplify right side
    93,251.12x = 12,266,996,199.02
  5. Step 5: Solve for x
    x = 12,266,996,199.02/93,251.12
  6. Step 6: Final answer
    x = 131,547.98

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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.