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Finding the Fourth Proportional to 64,312.69, 88,702.72 and 56,341.08

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Solution

The fourth proportional to 64,312.69, 88,702.72 and 56,341.08 is: 77,707.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,312.69 : 88,702.72 = 56,341.08 : x
  2. Step 2: Convert to fraction form
    64,312.69/88,702.72 = 56,341.08/x
  3. Step 3: Cross multiply
    64,312.69x = 88,702.72 × 56,341.08
  4. Step 4: Simplify right side
    64,312.69x = 4,997,607,043.74
  5. Step 5: Solve for x
    x = 4,997,607,043.74/64,312.69
  6. Step 6: Final answer
    x = 77,707.95

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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.